TOPIC FIELDNOTES
Natural selection, adaptations, byproducts, and levels of explanation.
Hosts Dave Pietraszewski and David Pinsof introduce their podcast and discuss David Pinsof's intellectual background, exploring how an existential crisis and reading foundational books like The Selfish Gene and The Blank Slate led him to evolutionary psychology and a focus on big theoretical questions.
↗ 0:00 – 8:04Dave Pietraszewski and David Pinsof discuss the origins of Pinsof's research into status as a major selection pressure in evolutionary psychology. They examine the inherent contradiction where overtly pursuing status triggers negative social judgments—such as being perceived as selfish or narcissistic—which often sabotage an individual's efforts to raise their standing.
↗ 12:00 – 16:13Host Dave Pietraszewski and guest David Pinsof discuss how status seeking motivations involve trade-offs with cooperative behavior, noting that individuals abnormally high on status are often perceived as untrustworthy and linked to dark triad traits.
↗ 24:02 – 28:21David Pinsof and Dave Pietraszewski explore whether status seeking is categorical or a continuum, emphasizing that individual status-seeking threatens others while group or coalition-focused status-seeking can foster cooperative alliances.
↗ 28:22 – 36:04Dave Pietraszewski and David Pinsof discuss how dominance hierarchies and intergroup conflicts invariably rely on shared moral narratives or pretexts to justify coercion and conquest, noting that even revolutionary movements often fall into cyclical patterns of tyranny despite egalitarian origins.
↗ 48:07 – 51:03David Pinsof and Dave Pietraszewski explore the challenges of collective action and free-riding in evolutionary game theory, explaining that individuals require moral or sacred narratives to disguise self-interested or dominating group behaviors as universally beneficial in order to protect their reputations.
↗ 51:03 – 1:00:10Dave Pietraszewski and David Pinsof discuss how meta-representation—thinking about what others think—influences collective action and group mobilization. They examine how doubts regarding motivations can destabilize groups, and how the high stakes of intergroup competition can outweigh the costs of deception and false information about group character, as explained with attribution to Pinsof's paper.
↗ 1:00:10 – 1:04:44Dave Pinsof and Dave Pietraszewski discuss how viewing human activities through the lens of status competition can help identify toxic versus beneficial social structures. With attribution to the speakers, they examine science and market economies as status games that drive societal improvements, while analyzing public hostility toward capitalist systems.
↗ 1:12:11 – 1:19:44Dave Pietraszewski and David Pinsof discuss the negative externalities associated with societal status games and market competition. They explore how increased transparency about these externalities might help individuals navigate career and social choices, while acknowledging that social costs and predatory behaviors often remain hidden within institutional structures.
↗ 1:24:13 – 1:27:26David Pinsof and Dave Pietraszewski argue that cynicism is an underrated perspective rooted in evolutionary biology rather than bitterness. They explain that human motives driven by natural selection generally operate through self-interest, nepotism, or groupishness, while universally altruistic goals akin to corporate public relations are evolutionary implausible.
↗ 1:27:26 – 1:36:15Host Dave Pietraszewski and guest David Pinsof discuss whether viewing human behavior and moral motivations through a strictly evolutionary lens leads to unhelpful cynicism. While Pinsof suggests taking off the 'Darwinian hat' to avoid emotional exhaustion, Pietraszewski argues that understanding the evolved logic behind emotions like love does not diminish their beauty or value.
↗ 1:36:15 – 1:43:44The hosts explore historical efforts to design education around autonomy and discuss how understanding institutional incentives and status games from a Darwinian or realistic perspective is necessary for creating meaningful reform.
↗ 1:52:47 – 1:56:18Hosts David Pinsof and Dave Pietraszewski introduce the podcast, discussing their approach to evolutionary psychology, the history of the discipline, the modularity of the mind, and the value of scientific disagreement.
↗ 0:00 – 2:50Dave Pietraszewski and David Pinsof discuss how personal experiences with religious groups led to an intellectual awakening around human nature. Pietraszewski describes stumbling upon Donald Brown's book Human Universals, which provided a framework that resonated deeply with his questions about cultural relativism and innate human psychology, a reaction also shared by Pinsof through Steven Pinker's work.
↗ 12:04 – 16:37Dave Pietraszewski and David Pinsof discuss the appeal of evolutionary psychology as an antidote to dogmatic thinking and status-driven rhetoric. Pietraszewski reflects on his early distaste for ideological conformity, comparing it to basement revival meetings where truth mattered more than social pressure, while Pinsof introduces the concept of the standard social science model.
↗ 24:08 – 29:12The hosts examine how institutional and economic incentives in academia, public relations, and advertising promote blank-slate ideologies. They argue that theories emphasizing human malleability and the supreme importance of ideas serve to justify social control and elevate the status of intellectuals and policy-makers.
↗ 29:12 – 36:10Host Dave Pietraszewski and guest David Pinsof discuss the importance of integrating rigorous evolutionary theory into the social sciences to serve as a check against human self-deception and self-aggrandizement. They examine the evolutionary psychology of psychology, exploring how well-intentioned researchers and therapists can be swayed by cultural epidemiological forces and institutional selection pressures.
↗ 36:10 – 40:58David Pinsof and Dave Pietraszewski discuss the history of science, drawing parallels between the Copernican revolution in astronomy and the current state of psychology. They argue that psychology still relies heavily on intuitive everyday mental-state reasoning delivered by natural selection, failing to account for its own perspective dependence.
↗ 40:58 – 48:12Dave Pietraszewski and David Pinsof discuss how psychological science often relies on intuitive folk concepts, such as memory or locomotion, leading to category mistakes similar to looking for a physical building called "the university." The speakers explain that collecting more data cannot fix fundamentally ill-posed scientific categories if researchers fail to understand the underlying structure of the mind.
↗ 48:12 – 53:34David Pinsof and Dave Pietraszewski explore how the cognitive revolution introduced a functional, software-level description derived from evolved artifact psychology. They examine how humans rely on intuitive folk psychology, folk physics, and folk engineering to reason about minds, physical interactions, and tools.
↗ 53:34 – 1:00:14Host Dave Pietraszewski and guest David Pinsof discuss how cognitive science is implicitly guided by folk psychology, treating intuitive constructs like memory and decision-making as singular, coherent entities. They examine whether this approach constitutes a fundamental category mistake in carving up the mind.
↗ 1:12:19 – 1:14:16Host Dave Pietraszewski and David Pinsof discuss the complexity of the human mind and whether folk psychological categories should be discarded in favor of adaptationist evolutionary psychology theories. Pinsof argues that everyday assumptions about the mind often mislead scientific inquiry.
↗ 1:24:23 – 1:26:43David Pinsof critiques the folk psychological idea that humans are fundamentally motivated by the pursuit of happiness, arguing instead via neuroscience and prediction error theory that happiness functions as a recalibration mechanism that declines with age rather than a goal in itself.
↗ 1:26:43 – 1:36:27Dave Pietraszewski and David Pinsof discuss whether foundational concepts in folk psychology—such as happiness, attention, and the unitary self—are true or false, arguing that mental representations often serve evolutionary functions or strategic reputational interests rather than literal accuracy.
↗ 1:36:28 – 1:45:01Dave Pietraszewski and David Pinsof discuss human nature, arguing that humans are fragile and have complex innate needs that require careful consideration rather than mechanistic manipulation. They explore how human groups function as folk constructs enabling cooperation, alliance-building, and coordination, alongside potential negative outcomes like conflict.
↗ 1:48:34 – 1:54:56David Pinsof argues that asking why we cannot all get along misunderstands evolutionary dynamics, since conflict and competition are endemic to biology. Instead, the true evolutionary puzzle requiring explanation is the existence of cooperation, altruism, kinship, reciprocity, and interdependence.
↗ 1:54:58 – 2:00:35Dave Pietraszewski and David Pinsof discuss the evolutionary and psychological underpinnings of cooperation and conflict, examining why individuals ask why people cannot get along. They explore how inclusive fitness, overlapping interests, group boundaries, and third-party manipulations shape human interactions, violence, and social discrimination.
↗ 2:00:35 – 2:07:19Dave Pietraszewski and David Pinsof reflect on the distinction between Darwinian levels of explanation and folk psychological understandings of human behavior. They conclude the conversation by discussing how evolutionary theory illuminates the human condition before signing off and inviting listener support.
↗ 2:07:19 – 2:09:29Hosts Dave Pietraszewski and David Pinsof introduce their podcast series on evolutionary psychology. They discuss the historical backlash against the discipline, why it often evokes strong negative reactions, and their goal to separate legitimate scientific inquiry from popular misconceptions and caricatures.
↗ 0:00 – 4:14David Pinsof and Dave Pietraszewski explore the popular conception of evolutionary psychology, comparing it to David Attenborough documentaries, Discovery Channel narratives, and Fred Flintstone caveman caricatures. They contrast these simplistic media depictions with the actual scientific framework combining Darwinian evolution and the computational theory of mind.
↗ 4:14 – 12:05Dave Pietraszewski and David Pinsof discuss why evolutionary psychology is frequently misunderstood by lay people, noting how complex ideas get filtered through topics of sex and death, political biases, and Dan Sperber's cultural attractor theory. The speakers examine why simplistic caricatures easily spread in culture.
↗ 12:07 – 20:29David Pinsof and Dave Pietraszewski explore evolutionary psychology as a framework for reverse engineering social systems. Using the analogy of aliens examining a car, they explain how understanding an organism's evolutionary function helps researchers carve up complexity rather than getting distracted by irrelevant features.
↗ 20:29 – 24:10Dave Pietraszewski and David Pinsof discuss how evolutionary psychology moves beyond superficial folk psychological descriptions—such as the simple idea that joining groups feels good—by examining the functional design and real-world adaptive challenges organisms face. Using examples from armed groups and human social dynamics, the hosts illustrate how an evolutionary perspective translates everyday behavior into underlying evolved software.
↗ 24:11 – 30:29The hosts explore common misconceptions about evolutionary psychology, clarifying that evolutionary software enables behavioral flexibility rather than rigid responses. They also explain that biological fitness is not a simple dichotomy of life and death, but rather a rich continuum encompassing social support, alliances, health, status, and mating market attractiveness.
↗ 30:29 – 36:13Dave Pietraszewski and David Pinsof discuss how complex adaptations and group psychologies emerge gradually through subtle genetic changes over time. They also examine evolutionary perspectives on senescence and aging, explaining why natural selection cares less about organisms after their reproductive years.
↗ 36:13 – 40:42Dave Pietraszewski and David Pinsof discuss how coalitional psychology and the 'smoke alarm principle' lead people to treat mild deviations from political narratives as hostile opposition. They explore why evolutionary psychology is often categorized as politically controversial, touching on how evolutionary ideas interact with debates in feminism.
↗ 48:13 – 50:33The hosts wade into controversial territory regarding gender representation in power and STEM fields. They examine evolutionary explanations involving status motivation, risk-seeking, and psychological differences in interest between people versus things, while debating whether these disparities represent natural outcomes or systemic injustices.
↗ 50:34 – 1:00:19Dave Pietraszewski and David Pinsof discuss how academia's class distribution and the life experiences of scientists can potentially introduce biases into scientific perspectives. They also examine how popular evolutionary psychology podcasts often rely on reductive interpretations of human nature, political figures, and social structures.
↗ 1:00:19 – 1:08:42The hosts analyze the complexity of human cognitive software, noting that focusing on single evolutionary tendencies—such as sexual variety differences between men and women—oversimplifies human behavior. They argue that multiple competing evolved mechanisms, trust dynamics, and relationship contexts interact simultaneously, avoiding the trap of essentialism.
↗ 1:08:42 – 1:12:22Dave Pietraszewski and David Pinsof discuss how evolutionary psychology is often misinterpreted through an overly reductionistic lens, treating single adaptations as deterministic drivers of behavior. Drawing an analogy to the bladder, they explain that humans possess multiple competing motivations, and that genes shape predispositions rather than directly pulling the strings of behavior.
↗ 1:12:22 – 1:19:20Dave Pietraszewski and David Pinsof discuss why evolutionary psychology matters beyond political debates, arguing that it provides a user guide for understanding human nature, needs, and complexities. Pietraszewski compares studying evolved psychological adaptations to understanding an animal's natural ecology, emphasizing that recognizing our intrinsic nature fosters self-discovery, humility, and better treatment of ourselves and others.
↗ 1:24:24 – 1:34:28David Pinsof reflects on Pietraszewski's points, summarizing that evolutionary psychology offers humility regarding human complexity and a clearer window into fundamental human needs. They discuss how evolved psychology helps differentiate between shallow interactions and deep, meaningful friendships that were critical for ancestral survival.
↗ 1:34:29 – 1:36:28Host David Pinsof discusses how modern society's reliance on shallow, transactional relationships fails to satisfy human evolutionary needs for deep, meaningful connections. With input from Dave Pietraszewski, they examine how unfulfilled social needs drive phenomena like cults and political activism, while contrasting this with the adaptive design of human psychology.
↗ 1:36:28 – 1:39:32Dave Pietraszewski and David Pinsof critique the social sciences for portraying humans as inherently stupid, biased, and gullible. Drawing on evolutionary game theory and the work of Hugo Mercier, they argue that human communication and cognition reflect a deep, strategic rationality shaped by ancestral survival pressures.
↗ 1:39:32 – 1:48:31Hosts Dave Pietraszewski and David Pinsof discuss their level of optimism regarding evolutionary psychology, debating whether it should serve as a foundational meta-theory for the behavioral sciences and philosophy, or if it functions merely as a useful perspective among many.
↗ 1:48:31 – 1:58:17The hosts examine how evolutionary thinking sheds light on perennial philosophical debates—such as free will, morality, and consciousness—by tracing them back to evolved psychological intuitions, and they conclude the episode by reflecting on the shared motivations behind their podcast.
↗ 1:58:17 – 2:00:36Hosts Dave Pietraszewski and David Pinsof introduce their guest, evolutionary psychologist Daniel Conroy-Beam, highlighting his application of computational and mathematical methods to human mate choice and discussing the scope of the episode.
↗ 0:00 – 2:05Daniel Conroy-Beam shares his academic origins with hosts Dave Pietraszewski and David Pinsof, describing how an introductory psychology course taught by David Lewis at the University of Texas led him to evolutionary psychology and his subsequent work in David Buss's lab.
↗ 2:12 – 12:02Hosts Dave Pietraszewski and David Pinsof discuss with guest Daniel Conroy-Beam how human mating serves as an intrinsically compelling gateway topic into evolutionary psychology. They contrast the intuitive appeal of mating research with more mysterious topics like political ideologies and sacred values.
↗ 12:02 – 14:23Guest Daniel Conroy-Beam outlines the historical trajectory of human mating research, highlighting foundational works like Don Symons's evolution of human sexuality and David Buss's empirical survey approaches, which utilized personality psychology methods to validate evolutionary theories through cross-cultural sex differences.
↗ 14:28 – 24:02Dave Pietraszewski, David Pinsof, and guest Daniel Conroy-Beam discuss the historical origins and trajectory of evolutionary psychology, reflecting on how starting the field with sex differences brought prominent attention and solid findings while also stamping the discipline with a controversial public reputation compared to more cooperative approaches.
↗ 24:02 – 31:51The speakers analyze the dominant constructs in human mating research established by David Buss, such as jealousy, mate preferences, and mating strategies, arguing that decades of research have heavily rehashed these same themes through sex differences and that the field must move beyond them.
↗ 31:55 – 36:05Dave Pietraszewski, David Pinsof, and guest Daniel Conroy-Beam discuss the limitations of focusing predominantly on sex differences in human mating research. They advocate for a broader, more computational approach to understanding shared mating psychology, partner preferences, and the systemic incentives in academia that favor safer research topics.
↗ 36:05 – 42:01Host Dave Pietraszewski and guest Daniel Conroy-Beam examine differing interpretations of human mate preferences, contrasting Todd's view on measurement limitations with Eastwick's argument that attraction is unpredictable. The speakers analyze how artificial contexts like college student speed-dating studies restrict range and fail to capture natural human mating decisions, noting that expanding participant diversity yields better preference predictability.
↗ 48:08 – 53:54Daniel Conroy-Beam and David Pinsof discuss ideological opposition to evolutionary psychology and how critics use null results from speed-dating studies to challenge the field. Conroy-Beam then highlights recent longitudinal research demonstrating that when studying naturalistic real-world choices rather than brief speed dates, stated mate preferences successfully predict long-term partner selection.
↗ 53:54 – 1:00:10Dave Pietraszewski, David Pinsof, and guest Daniel Conroy-Beam discuss how researchers poorly define and measure mate preferences. Conroy-Beam argues that traditional univariate approaches ignore the complex bundle of traits people must evaluate and fail to model how the mind evolved to solve adaptive problems.
↗ 1:00:10 – 1:05:42The speakers examine mating market dynamics, noting that individuals must consider mutual interest and their own mate desirability. Conroy-Beam critiques psychology's reliance on simplistic statistical models over robust theoretical frameworks, highlighting agent-based modeling as a better approach.
↗ 1:05:42 – 1:12:10Host Dave Pietraszewski and guest Daniel Conroy-Beam discuss the historical divide between cooperation research and mating psychology, noting how early evolutionary psychology focused heavily on sex differences and broad constructs rather than detailed task analyses of ongoing relationships and parenting.
↗ 1:12:10 – 1:19:15The speakers discuss how early debates over domain specificity and sex differences served as useful wedges to establish evolutionary psychology, but argue that the field must now move past those old arguments toward rigorous task analyses and adaptationist approaches.
↗ 1:19:16 – 1:24:11Dave Pietraszewski, David Pinsof, and guest Daniel Conroy-Beam discuss historical shifts in evolutionary psychology conferences and programs. Conroy-Beam expresses concern over a perceived decline in rigorous adaptationist task-analysis approaches, arguing that some modern researchers apply mainstream psychological statistical methods to topics like mating without grounding their work in rigorous evolutionary problem formulations.
↗ 1:24:12 – 1:29:43The speakers pivot to positive developments in the field, highlighting advancements in mate choice debates, behavioral genetics, and cultural evolution from the Paris school. They discuss neglected yet crucial human topics such as communication, reasoning, epistemic vigilance, parenting, emotions, and friendship networks, praising specific researchers who are producing insightful work in these areas.
↗ 1:29:43 – 1:36:15Host Dave Pietraszewski asks guest Daniel Conroy-Beam what he would change about psychology or Human Behavior and Evolution Society (HBES). Conroy-Beam suggests requiring evolutionary psychologists to express hypotheses through formal adaptationist models and task analyses. The speakers also discuss anthropology's broader scope, structural publishing incentives, and the tendency for evolutionary psychology to sometimes resemble standard psychology with an evolutionary twist.
↗ 1:36:15 – 1:40:43In this discussion, Dave Pietraszewski, David Pinsof, and guest Daniel Conroy-Beam examine the historical and current status of evolutionary psychology. They discuss how general acceptance of evolutionary approaches has grown over decades, while noting ongoing challenges regarding adaptationism, task analysis, and how the field interfaces with broader psychological research.
↗ 1:48:16 – 1:54:12The speakers discuss concerns about how the social capital and credibility of evolutionary psychology are utilized within the scientific community. The episode concludes with acknowledgments, information about guest Daniel Conroy-Beam's Computational Mate Choice Lab, and standard closing remarks from the hosts about future episodes.
↗ 1:54:12 – 1:58:05The hosts and Jaimie Krems discuss why they were initially drawn to evolutionary psychology. They explore how evolutionary theory provides satisfying foundational explanations for human behavior, contrasting it with other cultural or philosophical frameworks that fail to answer deeper questions of ultimate causation.
↗ 6:53 – 12:02Hosts Dave Pietraszewski and David Pinsof chat with guest Jaimie Krems about her intellectual background, including how she discovered evolutionary psychology through popular science books and her time studying at Oxford with Robin Dunbar, connecting early inspirations to her broader academic journey.
↗ 12:02 – 19:52The speakers examine the social brain hypothesis, discussing whether large human brains evolved primarily to navigate complex social landscapes and politics rather than solitary tool-making. They also consider how traditionally solitary cognitive faculties, such as reasoning and episodic memory, are increasingly understood as social adaptations.
↗ 19:53 – 24:06Host Dave Pietraszewski and guest Jaimie Krems discuss the navigation of academic disciplines, comparing the practical realities of psychology and anthropology. They recount humorous field stories about field site hardships, academic mentorship rejections, and the journey toward graduate programs at Arizona State University.
↗ 24:06 – 33:27Jaimie Krems discusses landing an academic position at Oklahoma State University, establishing a research center, and eventually moving to UCLA. The conversation transitions toward her core research interests in human relationships and the study of friendship.
↗ 33:27 – 36:09Host Dave Pietraszewski and guest Jaimie Krems discuss the study of women's social relationships, noting that competition and aggression rely on the same underlying cognitive machinery as friendship and alliance building. Krems explains her long-term goal to establish friendship science within the social sciences, drawing parallels to how evolutionary biology and engineering enhance our understanding of human behavior and help address real-world social challenges.
↗ 36:09 – 39:20The speakers examine the modern problem of adult loneliness and its severe consequences for physical health and well-being. Krems highlights research showing that lacking social support is comparable to smoking cigarettes daily, discusses potential physiological and stress-related mechanisms, and notes that empirical intervention data for making adult friends remain sparse despite ongoing studies.
↗ 39:20 – 48:15Dave Pietraszewski, David Pinsof, and guest Jaimie Krems discuss the prevalence of premature advice in social science and how modern urban environments and lack of shared physical architecture contribute to the loneliness epidemic. They explore how small-scale societies and smart city planning historically fostered natural, repeated social interactions.
↗ 48:15 – 55:59Host Dave Pietraszewski, David Pinsof, and guest Jaimie Krems discuss the inherent uncertainties and asymmetries in friendships, where individuals often misjudge how much others like them. They compare friendship dynamics to romantic relationships, noting that friendships lack clear relational milestones, escalation stages, or cultural scripts, creating significant coordination and common knowledge challenges.
↗ 1:00:16 – 1:04:14The speakers examine whether belonging to a minority or embattled group, such as evolutionary psychology, increases camaraderie beyond simple group membership. They discuss how costly initiation rites, hazing, and entry barriers act as mechanisms to weed out uncommitted individuals and predict group longevity, connecting these dynamics to agent-based modeling of social association values.
↗ 1:18:45 – 1:24:20Dave Pietraszewski, David Pinsof, and guest Jaimie Krems discuss agent-based models showing how reciprocity and third-party social learning lead groups to assort by association value, similar to mating markets. They also explore the challenges that romantic partners and couples introduce into social dynamics and friendship networks.
↗ 1:24:21 – 1:29:45The hosts and Jaimie Krems examine why friendship is culturally viewed as a fluffy luxury rather than a costly evolutionary investment with trade-offs. They discuss ambivalent or bad friendships, the hidden social drains of peer networks, and why adult friendship has historically been understudied by psychologists compared to romantic relationships.
↗ 1:29:46 – 1:36:21Dave Pietraszewski, David Pinsof, and Jaimie Krems discuss the historical lack of dedicated scientific theories or academic training regarding friendship in mainstream psychology. They explore how modern, affluent societies insulate people from ancestral hardships like extreme injuries or resource scarcity, which historically served as crucial tests for identifying true friends versus fair-weather companions.
↗ 1:36:22 – 1:42:20The speakers examine evolutionary psychology frameworks for friendship, including the alliance hypothesis and the banker's paradox model of social insurance. Jaimie Krems and David Pinsof discuss how evolutionary perspectives provide robust theories that mainstream relationship science misses, while also noting that researchers often rely too heavily on college student samples removed from real economic hardships.
↗ 1:42:21 – 1:48:24Guest Jaimie Krems and the hosts discuss the definition of friendship, distinguishing it from romantic relationships, and examine cognitive mechanics such as allocentric representations and welfare trade-off ratios in navigating social alliances and interpersonal conflicts.
↗ 1:48:24 – 1:55:36Dave Pietraszewski, David Pinsof, and Sheina Lew-Levy discuss the critical role of anthropology in keeping evolutionary psychology grounded. They explore how cross-cultural field research challenges assumptions about human behavior, such as age-based imitation biases, and why maintaining a connection between psychology and anthropology is vital for understanding human nature.
↗ 24:06 – 28:54Hosts Dave Pietraszewski and David Pinsof discuss the integration of playgrounds in European public spaces compared to the US, leading into Pinsof's evolutionary puzzles about his toddler daughter's eating and sleeping habits. Guest Sheina Lew-Levy responds by connecting child behavior to cultural schedules, brain development, and evolutionary contexts.
↗ 1:00:13 – 1:08:06David Pinsof and Sheina Lew-Levy explore parent-offspring conflict regarding sleep arrangements and safety, contrasting Western schedules with hunter-gatherer communities in the Congo. Lew-Levy highlights how egalitarian social structures and nighttime socializing shape different family dynamics and child-rearing pressures.
↗ 1:08:06 – 1:12:17Dave Pietraszewski, David Pinsof, and Sheina Lew-Levy discuss children's unique physical proportions, free time, and peer interactions as drivers of innovation and social norm formation. They explore how children's play and peer-group dynamics in both small-scale hunter-gatherer societies and modern industrialized settings can seed cultural changes that eventually emerge in adulthood.
↗ 1:24:17 – 1:33:36Dave Pietraszewski, David Pinsof, and guest Sheina Lew-Levy discuss how children encounter death and mortality in daily life, ranging from hunting exposure to diverse cultural beliefs about reincarnation and the afterlife. They also examine peer learning, single-age classrooms versus neighborhood friendships, and how age-based structures shape different societies.
↗ 1:36:20 – 1:42:49Hosts Dave Pietraszewski and David Pinsof introduce the podcast episode, discussing the goals of evolutionary psychology, the distinction between good and bad evolutionary work, and how the field developed from sociobiology and the foundational insights of Tooby and Cosmides focusing on psychological mechanisms rather than behavior.
↗ 0:00 – 8:25Dave Pietraszewski and David Pinsof use analogies like plant phototropism and falling leaves to explain why studying surface-level behaviors lacks predictive power. They emphasize that evolutionary psychology seeks underlying causal cognitive systems that allow scientists to make accurate inferences across new contexts.
↗ 8:25 – 12:03Dave Pietraszewski and David Pinsof discuss the methodological limitations of focusing strictly on behavioral descriptions and lists of psychological biases. They argue that scientific progress requires examining underlying psychological design and human nature as shaped by natural selection, avoiding descriptive cul-de-sacs.
↗ 12:03 – 15:08Dave Pietraszewski and David Pinsof address the common criticism that evolutionary psychology relies on unfalsifiable just-so stories. They provide empirical counterexamples, discussing how hypotheses regarding kin selection in homosexuality and social categorization processes generate testable predictions about underlying psychological design.
↗ 15:08 – 24:06Dave Pietraszewski and David Pinsof discuss cognitive processes underlying social categorization, introducing the Who Said What paradigm used by empirical psychologists. They explain how researchers measure non-conscious categorization of individuals by social features like sex, age, and race, establishing decades of experimental background before evolutionary psychology approaches.
↗ 24:06 – 30:57Dave Pietraszewski and David Pinsof examine decades of failed attempts by social psychologists to eliminate racial categorization. They explore how researchers grew pessimistic about overcoming these biases until evolutionary psychologists like Leda Cosmides, John Tooby, and Rob Kurzban reconsidered the ancestral environment and cognitive design.
↗ 30:57 – 36:10Dave Pietraszewski and David Pinsof discuss the functional claims of evolutionary psychology regarding mental software. They emphasize that any evolutionary hypothesis must align with natural selection and warn against relying on untestable just-so stories, contrasting poor evolutionary psychology with rigorous functional analysis.
↗ 36:10 – 39:04The speakers evaluate whether race could be an enduring evolutionary feature, noting that modern racial categories are recent and volatile. They introduce the alliance hypothesis as a more plausible explanation for how human minds track cooperation and alliances rather than racial categories.
↗ 39:04 – 48:11Dave Pietraszewski and David Pinsof discuss how cooperation, competition, and coordination form foundational evolutionary principles. They explain that navigating complex social alliances is crucial for fitness, requiring an evolved learning system designed to track patterns of affiliation and hostility rather than relying on innate, predetermined group identities.
↗ 48:12 – 53:52The speakers examine how the alliance-tracking software functions as an evolved learning system that detects social cues predicting human interactions. They argue that racial categorization is a byproduct of these mechanisms rather than a dedicated adaptation, functioning as a social construct shaped by historical patterns of coordination and discrimination.
↗ 53:52 – 1:00:12Dave Pietraszewski and David Pinsof discuss how evolutionary psychology models the human mind as an alliance tracking system. By presenting experimental scenarios where cooperation cues override racial divisions in the "who said what" paradigm, researchers demonstrated that categorization by race can be strongly decreased or eliminated when more relevant alliance cues are introduced.
↗ 1:00:12 – 1:07:27The speakers delve into further experimental nuances, examining whether reductions in racial categorization stem from failures to encode or from selective retrieval inhibition. They explain that the mind appears to promiscuously encode race while selectively retrieving or inhibiting it depending on contextual relevance, showcasing the adaptive sophistication of human social cognition.
↗ 1:07:28 – 1:12:15Host Dave Pietraszewski and David Pinsof discuss how racial categorization is a byproduct of an evolved alliance tracking system rather than an adaptation for race itself. They explain that evolutionary psychology moves beyond arbitrary behavioral descriptions by generating novel, testable design predictions, contrasting adaptationist reasoning with common criticisms of untestability.
↗ 1:12:15 – 1:19:18Dave Pietraszewski and David Pinsof examine how understanding the evolutionary function of mental traits like anger, humor, and jealousy allows researchers to generate an abundance of empirical predictions. They describe using task analyses in graduate seminars to map out design features for solving ancestral adaptive problems.
↗ 1:19:19 – 1:24:16Dave Pietraszewski and David Pinsof discuss the immense complexity of human psychological machinery, comparing systems like food learning and alliance tracking to building a robot. They explore how empirical research maps out cognitive functions, addressing criticisms of evolutionary psychology and highlighting productive areas of study like emotional research.
↗ 1:24:16 – 1:27:51David Pinsof and Dave Pietraszewski examine Aaron Sell's work on the triggers and evolutionary functions of anger. Contrasting frustration-aggression theory with welfare trade-off models, they explain how anger functions as software for negotiating better treatment, evaluating costs, and managing relationship-dependent strategies.
↗ 1:27:52 – 1:36:17Dave Pietraszewski and David Pinsof discuss the evolutionary mechanics of anger, explaining how the emotion functions as an internal calculation of costs and benefits between individuals. They analyze how welfare trade-off ratios govern interpersonal conflict, how anger acts to recalibrate these ratios without physical surgery, and how various strategies can diffuse angry responses.
↗ 1:36:17 – 1:42:43The speakers examine real-life vignettes that demonstrate how anger responds to perceived internal mental states rather than just overt behavior, such as a partner getting angry without any visible action. They conclude by discussing how having a clear theory of evolutionary function cuts through behavioral noise and provides a structured social grammar for human emotions.
↗ 1:42:44 – 1:48:23Host Dave Pietraszewski and David Pinsof discuss how evolutionary task analysis and adaptationism help constrain the hypothesis space in psychology. By making explicit assumptions about ancestral selection pressures, researchers can evaluate the plausibility of hypotheses, such as ruling out racial categorization while supporting plausible adaptations like alliance formation and anger.
↗ 1:48:23 – 1:55:57Dave Pietraszewski and David Pinsof examine criteria for good evolutionary solutions, explaining that cognitive adaptations must efficiently solve ancestral problems rather than simply pursue subjective happiness or positive emotional states, which misinterprets how natural selection designs motivational systems.
↗ 1:55:57 – 2:00:24Dave Pietraszewski and David Pinsof discuss how viewing human psychology through an evolutionary and engineering lens unessentializes basic concepts like groups and happiness. Pinsof argues that happiness is not a mere motivational tool to acquire fitness, but an adaptation for recalibrating expectations and motivations when outcomes exceed initial predictions, offering a more rigorous framework than traditional social identity theory.
↗ 2:00:24 – 2:05:50The hosts integrate social identity theory with their adaptationist framework, explaining that group membership satisfaction shifts dynamically with status and alternatives. They conclude that moving beyond simplistic intentional explanations transforms vague psychological statements into testable scientific predictions, avoiding circular just-so stories in evolutionary psychology.
↗ 2:05:51 – 2:12:24Dave Pietraszewski and David Pinsof discuss why there is no such thing as non-evolutionary psychology, arguing that any claim about the mind entails evolutionary assumptions. Making these assumptions explicit helps researchers constrain hypothesis spaces, avoid implausible theories, and open up new avenues for scientific criticism and refutation.
↗ 2:12:24 – 2:14:45The hosts discuss the historical critique of evolutionary psychology as relying on just-so stories, touching upon Rudyard Kipling's imperialist background, before wrapping up the episode with listener reminders, requests for reviews, and closing remarks about community support on Patreon.
↗ 2:14:45 – 2:18:32Joined by guest Pat Barclay, the hosts examine a follow-up listener review criticizing long guest introductions, jargon-dropping, and deep dives into research. The participants debate whether listeners prefer hearing about empirical research details or broad real-world implications.
↗ 6:49 – 12:00Dave Pietraszewski, David Pinsof, and guest Pat Barclay thoroughly discuss listener reviews regarding the overall accessibility of evolutionary psychology content, balancing complex jargon with broader audience appeal, and the potential pitfalls of polished media presentations that often overstate scientific implications.
↗ 12:00 – 14:55Host Dave Pietraszewski, David Pinsof, and guest Michael Moncrieff discuss the psychological and game-theoretic processes of radicalization. Moncrieff explains that group commitment often precedes ideological understanding, and he proposes that envy plays a central emotional role in driving individuals toward extremist organizations and perceived ultra-cooperative harmony games.
↗ 12:05 – 18:08Host Dave Pietraszewski and guest Michael Moncrieff discuss Michael's research on the natural emergence of the drag queen phenomenon as a high-cost status-building strategy in early gay communities, comparing it to costly signaling models of self-harm practices in specific social environments.
↗ 36:08 – 44:27The hosts interview Michael Moncrieff about his personal origin story, exploring how his early work with wildlife in zoos and aquariums led him to biological and evolutionary perspectives to answer fundamental questions about human and animal behavior.
↗ 44:28 – 48:12Guest Michael Moncrieff explains how evolutionary psychology helps explain why terrorism triggers intense, all-or-nothing coalitional threat responses and precautionary administrative measures. Host David Pinsof then discusses how terrorism provokes an outsized emotional reaction despite objectively low statistical risk, comparing it to historical policy blunders and exploring whether this dynamic represents an evolutionary mismatch.
↗ 48:12 – 52:49Michael Moncrieff discusses the ambiguity in defining terrorism and how varying social positions and degraded cues affect how people categorize violent acts. The hosts then examine the staggering human and economic toll of post-9/11 military conflicts, reflecting on how evolved psychological drives for retribution generate catastrophic downstream consequences.
↗ 52:50 – 1:00:15The speakers reflect on the massive human toll of state conflicts and military interventions, noting that public support generally favors protecting civilians despite actions taken by administrations. They explore how modern warfare detaches decision-makers from the evolutionary cues of suffering—such as displacement and famine—that historically served as natural checks on retaliation.
↗ 1:07:31 – 1:12:18Host Dave Pietraszewski, David Pinsof, and guest Michael Moncrieff discuss the distinction between predatory aggression and bargaining aggression, examining how states respond to terrorism and how political incentives can lead leaders to favor strong reactions over effective long-term solutions.
↗ 1:12:18 – 1:17:27Michael Moncrieff and the hosts explore how radicalization is often driven by envy and predatory motives rather than simple reactive grievances, and how leaders frame conflicts to manufacture group support and disguise their true objectives.
↗ 1:17:28 – 1:24:20Dave Pietraszewski, David Pinsof, and guest Michael Moncrieff discuss why radicalized actors and terrorists engage in extreme violence, challenging the mainstream view that terrorism is primarily motivated by retaliatory grievance-based bargaining. Moncrieff argues that much of this behavior is actually predatory, driven by an inversion of costs and benefits where inflicting destruction feels thrilling and pleasurable, bypassing traditional collective action problems.
↗ 1:24:20 – 1:31:47The speakers examine how cost-benefit landscapes, social structures, and familial support systems incentivize individuals to participate in extreme violence and suicide bombing. Moncrieff notes that only a small percentage of the population typically initiates ethnic violence or terrorist acts, and these active starters generally possess low community connections and high potential payoffs.
↗ 1:31:47 – 1:36:24Hosts Dave Pietraszewski and David Pinsof introduce the podcast and their guest, veteran evolutionary psychologist Deborah Lieberman. They discuss her academic origins, including how a class by David Sloan Wilson at Binghamton University shifted her trajectory from pre-med and neurosurgery toward evolutionary psychology and the Center for Evolutionary Psychology.
↗ 0:00 – 7:30The hosts and Deb Lieberman explore why evolutionary psychology appeals to researchers, highlighting the attraction to scientific controversy, tackling challenging intellectual frontiers, and the siege mentality of early evolutionary behavioral sciences.
↗ 7:30 – 12:03Hosts Dave Pietraszewski and David Pinsof chat with guest Deb Lieberman about her early experiences in the field, reminiscing about the familial, collaborative environment at Leda Cosmides and John Tooby's house, and discussing how the social atmosphere and public perception of evolutionary psychology have shifted over time.
↗ 12:03 – 18:00Deb Lieberman discusses the current health and future challenges of evolutionary psychology, emphasizing the need for better training in evolutionary cognitive science and task analysis. The speakers also touch upon Lieberman's research on kin detection, disgust, and incest avoidance.
↗ 18:01 – 24:06Dave Pietraszewski and Deb Lieberman discuss how humans and animals detect genetic relatives without language, highlighting cues such as maternal association and co-residency duration. Lieberman explains how these inputs drive inbreeding avoidance and how the research spans multiple levels of analysis from biological programming to cultural variations.
↗ 24:06 – 28:32Deb Lieberman explains how moral psychology uses disgust to track personal norms, assess others' moral campaigns, and signal coalition allegiance. The speakers explore individual differences in moralization, political ambition, and how leaders use moral and disgust narratives to solve complex alliance coordination problems.
↗ 40:06 – 48:11Hosts Dave Pietraszewski and David Pinsof converse with guest Deb Lieberman about studying the intersection of disgust psychology, morality, and the legal system. Lieberman discusses ongoing research examining how disgust influences juror coordination and judgment, and touches upon historical work exploring how innate aversion mechanisms and family co-residence cues relate to perceptions of incest.
↗ 48:12 – 55:41Deb Lieberman shares real-world case studies involving legal briefs and inquiries regarding adult siblings reared apart who formed relationships without developing sibling aversion. The speakers examine the disconnect between evolved biological cues of co-residence, subjective feelings of disgust, and rigid legal frameworks governing familial relationships and consent.
↗ 55:42 – 1:00:13The hosts and Deb Lieberman examine psychological reactions during the COVID-19 pandemic, questioning whether disgust sensitivity shifted across the population and discussing how coalitional dynamics and political belief systems manifested during the global health crisis.
↗ 1:04:14 – 1:12:13Dave Pietraszewski, David Pinsof, and Deb Lieberman discuss how disgust sensitivity relates to the political spectrum. David Pinsof argues that correlations between political orientation and disgust are primarily driven by sexual disgust and underlying reproductive strategies, reflecting conservative coalition interests rather than general disease avoidance.
↗ 1:12:14 – 1:15:20The hosts talk with guest Deb Lieberman about her long tenure as editor of the journal Evolution and Human Behavior. They explore special issues, publishing trends, anthropology contributions, debates on topics like the evolution of war, and the future potential for applied evolutionary psychology.
↗ 1:15:21 – 1:24:17Host Dave Pietraszewski and guest Deb Lieberman discuss editorial strategy and quality control at an academic journal. Lieberman explains her adaptationist criteria for manuscript selection, the rejection of poorly reasoned or outdated theories, and how she balances personal scientific biases with allowing the broader history of science to evaluate incremental research.
↗ 1:24:17 – 1:31:29The speakers examine the challenges facing junior evolutionary psychologists, emphasizing the need for greater engagement with cognitive programs and information processing. Lieberman expresses frustration with vague invocations of culture and learning as explanatory catchalls, arguing that evolutionary psychology should instead serve as the rigorous cognitive science of culture.
↗ 1:31:30 – 1:36:18Dave Pietraszewski, David Pinsof, and guest Deb Lieberman discuss the foundational role of anthropology and evolutionary psychology in social science, emphasizing the importance of cognitive programs, levels of explanation, and honoring the legacy of John Tooby through theory-first adaptationism.
↗ 1:36:18 – 1:43:06Host Dave Pietraszewski, David Pinsof, and guest Deb Lieberman discuss scientific edge writing styles, theoretical contributions to journals like Evolutionary Human and Behavior, and explore consciousness conceptualized as a data format.
↗ 1:48:20 – 1:53:26The speakers examine whether moral concepts like blame and responsibility are merely coordination points or if they reflect evolutionary mechanisms for identifying actionable leverage points in human behavior.
↗ 1:53:26 – 2:00:22Dave Pietraszewski, David Pinsof, and guest Deb Lieberman discuss how attributions of responsibility and free will relate to tracking causality, reasons responsiveness, and coordinating group behavior.
↗ 2:00:22 – 2:09:57The hosts discuss how evolutionary psychology provides a new framework for examining long-standing philosophical concepts like free will and associationism, contrasting them with older historical models.
↗ 2:09:57 – 2:12:26Dave Pietraszewski, David Pinsof, and Deb Lieberman discuss the future directions of evolutionary psychology, emphasizing its integration with philosophy of mind, political science, and economics. They explore how understanding the evolutionary origins of human intuitions can help resolve long-standing philosophical puzzles and broaden the scope of evolutionary reasoning.
↗ 2:12:26 – 2:20:19The hosts and Deb Lieberman explore the evolutionary purpose of tears, proposing that they act as a specialized signal communicating extreme positive or negative value, particularly functioning as an amplifier for individuals with lower physical leverage or formidability.
↗ 2:20:20 – 2:24:27Dave Pietraszewski, David Pinsof, and guest Deb Lieberman discuss social emotions, contrasting pathogen disgust with social expressions like crying, and examine how weeping functions as a costly signal of extreme value and low leverage between individuals who value each other's welfare.
↗ 2:24:27 – 2:28:21Hosts Dave Pietraszewski and David Pinsof introduce their podcast on evolutionary psychology and welcome their guest, Chris Von Ruden from the University of Richmond's Jepson School of Leadership, highlighting his research on inequality, status, and the Chimane people in the Amazon.
↗ 0:00 – 1:50Guest Chris Von Ruden discusses his role as an anthropologist in an interdisciplinary leadership studies program at the University of Richmond, noting the general reception of Darwinian perspectives among social scientists, the importance of gene-environment interactions, and Tooby and Cosmides' distinction between evoked and transmitted culture.
↗ 1:54 – 12:05The hosts and Chris Von Rueden discuss the distinction between evoked culture, representing strategic responses to immediate environmental conditions, and transmitted culture, which involves social learning and cultural norms that can persist over time. They explore how these two mechanisms interact, lag, or generate complex technological designs through intergenerational transmission.
↗ 12:05 – 21:02Host David Pinsof and guest Chris Von Rueden discuss the demography and health profile of the Chimane people, noting higher mortality and pathogen exposures alongside lower rates of modern chronic illnesses. They examine the role of diet versus exercise in cardiovascular disease and explore the hygiene hypothesis, where childhood pathogen exposure provides protective effects against autoimmune issues despite trade-offs in infant mortality.
↗ 24:08 – 28:50The speakers examine the concept of egalitarianism and critique the persistent 'noble savage' trope found in philosophy and media. Guest Chris Von Rueden explains that anthropological research across smaller-scale societies reveals a more complex reality regarding human status motives, cooperation, and social hierarchy.
↗ 42:33 – 48:15Host Dave Pietraszewski and guest Chris Von Rueden discuss how various societies differ in both outcome-based equality and underlying status motives. They examine Christopher Boehm's concept of reverse dominance hierarchies, noting how coalitions of group members suppress overt domineering behavior, bullying, and braggadocio through mockery, humility norms, and sometimes expulsion.
↗ 48:15 – 54:01The speakers explore the paradoxes of status competition, where anti-signaling, humility, and rebelling against dominance can themselves be used to gain standing. They discuss how smaller-scale societies enforce moderation in hunting and generosity to preserve autonomy and avoid unpayable debt, contrasting traditional interdependence with modern market inequalities.
↗ 54:02 – 1:00:16The speakers discuss how individuals in traditional egalitarian and small-scale societies depend on cooperative networks and risk-sharing rather than private wealth or insurance. Chris Von Rueden explains that sharing and generosity are driven by risk minimization and reputational benefits rather than pure altruism or intrinsic inequality aversion.
↗ 1:00:17 – 1:04:13Dave Pietraszewski, David Pinsof, and Chris Von Rueden explore the evolutionary psychology behind the deservingness heuristic, examining how humans distinguish between laziness and bad luck. They discuss how modern large-scale societies misapply heuristics that evolved in smaller-scale ecologies where people could directly observe others' efforts and outcomes.
↗ 1:04:13 – 1:12:18Dave Pietraszewski, David Pinsof, and guest Chris Von Rueden discuss how aging and productivity declines affect social status and network size among the Chimane. They examine how judgments of bad luck versus low effort serve as political weapons in resource conflicts, influenced by political allegiances and coalitional psychology.
↗ 1:12:18 – 1:16:46The speakers examine whether risk susceptibility is a better framework than luck versus effort for understanding egalitarian distribution and reciprocity. They discuss how differences in vulnerability to shortfalls shape reciprocal altruism, and how multi-currency exchanges and indirect reciprocity allow divisions of labor even when individual risk profiles differ.
↗ 1:16:47 – 1:24:30Dave Pietraszewski, David Pinsof, and guest Chris Von Rueden discuss how sharing motives shift with ecology and risk. They examine political science and institutional trust across societies before exploring Von Rueden's personal academic transition from history and biology to biological anthropology and evolutionary psychology.
↗ 1:24:30 – 1:34:16The hosts and guest discuss the distinction between offensive and defensive status, arguing that fitness costs loom larger than benefits and that people are often more motivated by the fear of being perceived negatively than by a desire for moral superiority.
↗ 1:34:16 – 1:36:32The speakers discuss status psychology, arguing that avoiding low status and the bottom of social hierarchies is a much more powerful human motivation than striving to reach the top. Chris Von Rueden and the hosts explore how fear of social exclusion and low rank shapes risk profiles, signaling behaviors, and political attitudes such as last-place aversion.
↗ 1:36:32 – 1:43:51Brenda Bowser joins the hosts to recount how she and John Patton met in graduate school at UCSB, planned their lives and family around fieldwork, and navigated initial hurdles in New Guinea. Bowser details John's academic influences—such as Robert Wright, Bill Hamilton, Robert Trivers, and Frans de Waal—and explains how his dissertation on 'Thoughtful Warriors' investigated the evolutionary psychology of coalitional violence, men's status, and the ecological criteria for choosing their field site in Kanambo.
↗ 3:41 – 12:02Host David Pinsof and guest Brenda Bowser discuss the cultural and linguistic equivalence between forced abduction and a young woman voluntarily running off with a partner. Bowser explains early marriage ages, polygyny, and how conflicts surrounding marriage spark violent retaliation, raids, and conflict management strategies like fleeing to distant communities.
↗ 36:09 – 44:21Host David Pinsof and guest Brenda Bowser examine the Darwinian perspective that male competition over women drives tribal violence and reproductive advantages. Bowser agrees with this theoretical framework based on ethnographic data while emphasizing that daily life also centers heavily on conflict resolution and the shared community goal of living well.
↗ 44:21 – 48:15The speakers discuss gender differences in coalitional structures and social ties during conflicts. Brenda Bowser explains that women with greater cross-coalitional ties often had fewer kin within their own coalition, using those relationships as a safety net, whereas men maintained more clearly bounded coalitions tied to political landscapes and factions.
↗ 1:20:36 – 1:24:26Dave Pietraszewski and David Pinsof discuss with guest Brenda Bowser whether indigenous or small-scale community contexts uniquely hone political and coalitional cognition. Bowser reflects on seeing coalitions, status, and politics in both academic settings and indigenous contexts, arguing that human evolved psychology operates across modern and traditional environments alike.
↗ 2:00:36 – 2:07:24Hosts Dave Pietraszewski and David Pinsof introduce anthropologist Cristina Moya from UC Davis, discussing her academic background, her intellectual rigor, and the productive intersections and historical debates between different branches of evolutionary social sciences, such as UCLA cultural evolution and UCSB evolutionary psychology.
↗ 0:00 – 8:17The hosts and Cristina Moya discuss enduring theoretical disagreements in the evolutionary behavioral sciences, focusing on differing priors regarding human nature, the architecture of the mind, and the mechanisms that explain large-scale cooperation.
↗ 8:17 – 12:02Dave Pietraszewski, David Pinsof, and guest Cristina Moya discuss the major theoretical frameworks within evolutionary social sciences, including evolutionary psychology, human behavioral ecology, and cultural evolution. They examine how these different traditions approach human cognition, adaptive behavior, social learning, and cultural transmission across academic departments.
↗ 12:02 – 20:33Cristina Moya shares her background as an undergraduate at Berkeley piecing together evolutionary social science courses before pursuing graduate studies at UCLA. She describes the vibrant intellectual environment created by faculty members studying human behavior and evolution, which shaped her identity as an evolutionary anthropologist.
↗ 20:33 – 24:06Host Dave Pietraszewski and guest Cristina Moya discuss their shared graduate school experiences at UCLA within evolutionary anthropology and psychology departments. They examine the unspoken difficulties of anthropological fieldwork, environmental challenges, and why studying settings outside the United States is crucial for evolutionary social science.
↗ 24:06 – 30:01Cristina Moya explains how she selected her field site in the Peruvian altiplano to study Quechua and Aymara speakers. The speakers discuss how American ethno-racial taxonomies and migration histories differ profoundly from indigenous agropastoralist settings, offering a cleaner lens into human evolutionary priors regarding symbolic and linguistic group boundaries.
↗ 30:01 – 36:08Dave Pietraszewski, David Pinsof, and guest Cristina Moya discuss the social and power dynamics of indigenous communities in Peru, contrasting them with familiar Western political and class divisions. They examine how land conflicts, economic inequality, and cultural or linguistic differences shape intergroup relations and whether ethno-linguistic boundaries directly drive animosity.
↗ 36:08 – 43:52Dave Pietraszewski, David Pinsof, and Cristina Moya discuss language acquisition, pidgins and creoles, social motivations for second-language learning, and how group membership is linguistically and politically signaled through practices rather than fixed identities.
↗ 48:14 – 53:34Cristina Moya defines essentialism, drawing parallels to biological reasoning about species, and reviews cross-cultural research and meta-analyses showing high variability in whether adults view social and ethnolinguistic identities as fixed at birth.
↗ 53:34 – 1:00:17Host Dave Pietraszewski, host David Pinsof, and guest Cristina Moya discuss how social categories and psychological essentialism relate to power, class, and status. They explore whether group boundaries are maintained more rigidly by higher-status individuals and examine how people represent social categories and coalitions.
↗ 1:00:19 – 1:02:43The speakers discuss hypotheses regarding whether skin color or behavioral markers serve as cues for alliance membership and loyalty detection. Guest Cristina Moya introduces ethnographic work from Madagascar by Rita Astudi, which complicates simple assumptions about physical markers, essentialism, and group membership across different cultures.
↗ 1:02:44 – 1:12:22Dave Pietraszewski, David Pinsof, and guest Cristina Moya discuss how beliefs like flat earth theories can function as bridge-burning tactics and social signals that signal loyalty to an extremist group or subculture while alienating outsiders. They explore whether such implausible beliefs affect everyday material interactions and why evolutionary approaches help clarify these social dynamics.
↗ 1:12:22 – 1:20:02The speakers examine how taking an evolutionary approach helps ground the amorphous nature of group dynamics by focusing on practical organismal needs and coordination rather than underspecified categorization literature. They also reflect on documentaries about flat earthers, noting that such subcultural beliefs primarily serve social and community functions rather than arising from rigorous intellectual investigation.
↗ 1:20:02 – 1:24:22Dave Pietraszewski, David Pinsof, and guest Cristina Moya discuss how people process vast amounts of complex information, noting that scientific facts like a round earth or quantum mechanics are highly counterintuitive. They explore how accepting such beliefs relies on trust in experts or social groups rather than personal verification, connecting cultural evolution and cognitive psychology.
↗ 1:24:22 – 1:27:23Dave Pietraszewski, David Pinsof, and guest Cristina Moya discuss whether expressing unusual or wacky beliefs can be used strategically as an entrepreneurial leadership tactic. They compare this to early technology adoption, noting that higher-status individuals can better afford reputational risks. The conversation then transitions to defining charisma, with David Pinsof proposing that it involves successfully sending concealed or paradoxical social signals, such as virtue signaling without appearing to do so.
↗ 1:36:23 – 1:45:57The hosts and guest explore whether concepts like being "cool" differ from charisma, discussing how individuals signal status and coalition value. They consider whether coolness relates more to general respect and perceived genius or to social attractiveness, and how others assess these traits to decide whom to learn from or join in a coalition.
↗ 1:45:58 – 1:48:24Guest Cristina Moya discusses her academic journey from a history major to biological anthropology, inspired by an undergraduate instructor who critically engaged with the field's history. The hosts and Moya explore the role of curiosity-driven basic science, the challenges of translating evolutionary frameworks into real-world policy, and the importance of ethnographic perspectives in avoiding the pitfalls of top-down interventions.
↗ 1:48:24 – 1:58:30Dave Pietraszewski and David Pinsof humorously discuss how audience growth can be compared to exponential reproduction and natural selection, joking that sharing the podcast with others could help them take over the world, blending evolutionary concepts with playful banter about pyramid schemes and listener numbers.
↗ 2:00:26 – 2:00:54Hosts Dave Pietraszewski and David Pinsof introduce the podcast episode featuring guest Ed Hagen. They highlight Hagen's extensive knowledge across various scientific and anthropological domains, discussing topics such as mental health, evolutionary psychology, and his academic background.
↗ 0:00 – 5:13Ed Hagen shares his academic journey, starting as an undergraduate in physics and math, discovering human evolutionary history through ancient Mesopotamia, and questioning chemical imbalance theories of depression by observing real-life conflicts among friends. This led him to accidentally apply to the center for evolutionary studies at UCSB.
↗ 5:13 – 12:00Ed Hagen recounts his graduate school days at UCSB, his initial interactions with Nap Chagnon and John Tooby, and his early skepticism toward sociocultural anthropology's focus on advocacy over science. The hosts and guest discuss how reading George Williams's classic work on adaptation helped Hagen connect evolutionary theory to cognitive design and the brain.
↗ 12:00 – 22:01Ed Hagen discusses how personal observations of a friend experiencing severe paranoia and a traumatic background influenced his master's research on delusional disorder. The speakers explore evolutionary perspectives on human sociality, ostracism, and the challenges faced by individuals experiencing severe psychological distress.
↗ 22:02 – 24:01Dave Pietraszewski, David Pinsof, and guest Ed Hagen discuss an evolutionary hypothesis of delusions, suggesting they function as an evolved design to signal need and secure support during extreme social threats or potential ostracism, rather than representing a purely rationalized or manipulative strategy.
↗ 24:01 – 26:51Ed Hagen contrasts conventional psychiatric views of mental illness with an evolutionary perspective on depression and anxiety, arguing that unlike true cognitive dysfunctions such as schizophrenia, depression is typically a common, temporary, and adaptive response to severe environmental adversity.
↗ 26:51 – 36:02Dave Pietraszewski, David Pinsof, and guest Ed Hagen discuss how depression symptoms, such as loss of motivation and withdrawal, function not merely as emotional pain from adversity, but as a strategic bargaining strike against social partners when conflicts of interest arise and support is withheld.
↗ 36:02 – 41:31The hosts and Ed Hagen explore suicidality and self-harm as an extreme, costly signaling tactic on the continuum of depressive bargaining, noting that while risky, such acts can credibly signal genuine need and are observed across cultures in response to severe social conflicts.
↗ 41:32 – 48:08Dave Pietraszewski, David Pinsof, and guest Ed Hagen discuss how antidepressants and traditional psychotherapy function as painkillers rather than addressing root social conflicts and adversity. They examine clinical anecdotes where active therapist involvement and social support improved patient outcomes, contrasting this with a detached clinical model.
↗ 48:08 – 56:48The hosts transition to discussing widespread drug use among individuals experiencing mental health issues. Ed Hagen and his colleagues explore why traditional and modern populations dealing with conditions like depression and schizophrenia heavily consume substances like tobacco and caffeine, prompting an evolutionary investigation into why plants naturally produce these chemical compounds.
↗ 56:49 – 1:00:11Host Dave Pietraszewski and guest Ed Hagen discuss why plants produce neurotoxins to deter herbivores and how these chemical defenses mimic neurotransmitters. Hagen and David Pinsof explore the evolutionary hypothesis that human consumption of these toxic substances might serve as an adaptive self-medication strategy to target parasites like intestinal worms.
↗ 1:00:12 – 1:07:24David Pinsof and Ed Hagen review the intoxication-as-medicine model and contrast it with mainstream views comparing drugs to sugar and dopamine signaling. Hagen notes that initial reactions to drugs are aversive and explains how neurotoxins pose severe risks to children during brain development, aligning with data showing virtually no drug use in young children.
↗ 1:07:24 – 1:12:15Guest Ed Hagen and the hosts discuss how the evolutionary self-medication hypothesis explains patterns of drug use across age and sex. Hagen shares findings from a randomized controlled trial with Aka hunter-gatherers in the Congo Basin showing that treating intestinal worm infections reduced tobacco and cannabis consumption, supporting the idea that drug use can serve as a therapeutic or prophylactic adaptation.
↗ 1:12:15 – 1:21:02The speakers examine whether drug consumption is regulated by precise physiological mechanisms rather than simple reward hijacking. Hagen references experimental evidence on nicotine titration, demonstrating that smokers carefully adjust their puffing behavior and intake to maintain nicotine levels within a narrow band just below toxic thresholds.
↗ 1:21:02 – 1:24:19Host Dave Pietraszewski and guest Ed Hagen discuss how drug addiction involves bypassing human toxin defense mechanisms, such as injecting opioids or snorting cocaine, rather than engaging innate taste and metabolic defenses. They explore potential links between immune activation, parasite loads, and drug susceptibility, while critiquing the traditional concept of addiction.
↗ 1:24:19 – 1:31:46Host Dave Pietraszewski, David Pinsof, and guest Ed Hagen examine tobacco use, the controversies surrounding vaping as a safer alternative delivery method for nicotine, and how evolutionary insights challenge simplistic pop-culture views of neurotransmitters and addiction.
↗ 1:31:46 – 1:36:21Dave Pietraszewski, David Pinsof, and guest Ed Hagen discuss the history of evolutionary anthropology controversies, specifically addressing the false accusations made in the book *Darkness in El Dorado* against Napoleon Chagnon and geneticist James Neil. Hagen explains how Neil's historical field research in small-scale societies revealed a significant reproductive skew among headmen and proposed that general intelligence and diverse skills drove both leadership success and human encephalization.
↗ 1:36:21 – 1:45:02Ed Hagen, Dave Pietraszewski, and David Pinsof explore empirical findings with student Zach Garfield regarding leadership and intelligence across cultures. They discuss how leaders in small-scale societies offer value to both men and women by resolving conflicts across nested social structures, noting that the cognitive skills required to be an effective community leader overlap with those needed to be a successful husband.
↗ 1:45:03 – 1:48:22Dave Pietraszewski, David Pinsof, and Ed Hagen discuss how cognitive abilities evolved as valuable computational services provided to others, comparing leadership roles to the intensive problem-solving and conflict management mothers perform within families, highlighting parenting as an understudied area in evolutionary psychology.
↗ 1:48:22 – 1:54:27Hosts Dave Pietraszewski and David Pinsoff introduce guest Pat Barclay from the University of Guelph, praising his influential work on cooperation, altruism, and social partner choice in evolutionary social sciences.
↗ 0:00 – 5:22The hosts and Pat Barclay discuss the confusion between proximate mechanisms and ultimate Darwinian functions in behavioral literature, exploring why people mix up how the mind works with how it got there through selection pressures.
↗ 5:22 – 12:01Dave Pietraszewski, David Pinsof, and Pat Barclay discuss how human psychology evaluates cooperation and reputation. The speakers explore why admitting to reputation-seeking motives can trigger negative inferences about a person's genuine care for others, contrasting this with intrinsic motivations like parental love or close friendship, and how evolved psychology interprets Darwinian fitness explanations.
↗ 12:01 – 18:38David Pinsof and Pat Barclay examine stakeholder altruism, where individuals help others because of an intrinsic stake in their well-being and survival rather than strict reciprocity or reputation. They discuss historical precedents for this concept in evolutionary theory, including mutualism and irreplaceability, and how people strategically frame their cooperative motives.
↗ 18:38 – 24:05Dave Pietraszewski, David Pinsof, and guest Pat Barclay discuss stakeholder altruism, the bankers' paradox, and the alliance hypothesis in explaining friendship and conflict support. They examine how individuals value others based on reciprocity, shared stakes in well-being, and outside options, drawing comparisons to cleaner fish behavior studied by Redwan Bashari.
↗ 24:05 – 32:23The speakers discuss the importance of understanding accurate proximate motivations and evolutionary logic rather than relying solely on feelings of virtue when trying to effectively help others. They also connect these functional perspectives to parental investment, referencing research by Martin Daly and Margot Wilson on genetic stakes and parental love.
↗ 32:23 – 36:08The speakers discuss evolutionary perspectives on parental investment, examining how lower psychological thresholds for frustration in stepfamilies can be misconstrued as support for stepparental abuse or homicide. Citing researchers like Martin Daly and Margot Wilson, they explore how folk psychology often distorts scientific claims about kin versus non-kin relationships.
↗ 36:08 – 42:50Dave Pietraszewski, David Pinsof, and Pat Barclay examine why people push back against evolutionary explanations of prosocial behavior like charity. They analyze how highlighting reputational motives can undermine the very benefits of generosity, leading people to disavow self-interested or signaling reasons behind cooperative acts.
↗ 43:09 – 48:08Dave Pietraszewski, David Pinsof, and guest Pat Barclay discuss how reputational benefits and stakeholder psychology influence cooperation. They examine whether highlighting instrumental motives undermines intrinsic generosity, how groups monitor behavior, and how institutional structures like advertising or international trade can shape human concerns for others' welfare.
↗ 48:08 – 55:44The hosts transition to discussing the foundational evolutionary problem of cooperation, referencing Charles Darwin's puzzles regarding altruism in social insects. They explore why helping others can initially appear maladaptive due to the risk of free riders, and review classic solutions such as kin selection and reciprocity.
↗ 55:45 – 1:00:10Hosts Dave Pietraszewski and David Pinsof converse with guest Pat Barclay about his academic origin story, discussing how computer simulations of cooperation sparked his interest in evolutionary psychology and how he was drawn to careful, rigorous scientific literature that thoughtfully addressed alternative explanations and control conditions.
↗ 1:00:11 – 1:04:24The speakers examine confusion over proximate and ultimate causes in cooperation research, discussing how evolved psychological mechanisms and social emotions like guilt operate in evolutionarily novel or artificial laboratory environments where traditional social consequences are absent.
↗ 1:04:24 – 1:12:15Host Dave Pietraszewski and guest Pat Barclay discuss how the high costs of getting caught cheating influence human behavior, risk assessment, and decision-making in anonymous or artificial lab settings. They examine how people apply real-world heuristics to online games and why researchers often overinterpret initial experimental data.
↗ 1:12:16 – 1:17:06The speakers discuss the pitfalls of flashy scientific claims versus rigorous, methodical research. Pat Barclay then explains his work on competitive helping and biological markets, detailing how individuals signal their willingness and ability to be valuable partners in social exchange.
↗ 1:17:06 – 1:24:21Dave Pietraszewski, David Pinsof, and Pat Barclay discuss the biological market framework for partnerships, emphasizing how local environments, supply and demand, individual differences, and compensatory strategies shape cooperation, partner choice, and what traits are valued in social partners.
↗ 1:24:21 – 1:31:22David Pinsof floats an idea regarding the tension between partner choice psychology and intergroup competition, suggesting that political narratives and moral pretexts help reconcile this conflict by reassuring group members and maintaining cooperative value. Pat Barclay responds to the proposal and notes connections to signaling within the in-group.
↗ 1:31:24 – 1:36:22Dave Pietraszewski, David Pinsof, and Pat Barclay discuss the foundational figures of evolutionary psychology, Martin Daly and Margot Wilson, exploring their background in animal behavior, their pioneering homicide and parenting research inspired by Sarah Hrdy's work on lions, and the intellectual history behind naming the field.
↗ 1:36:23 – 1:44:23Dave Pietraszewski, David Pinsof, and Pat Barclay discuss the value of private, constructive criticism in scientific research compared to flashy public commentary. They then transition to discussing the research legacy of Margot, highlighting her work using homicide data as a rich, behavior-based dataset that avoids self-reporting and social desirability biases.
↗ 1:48:26 – 1:52:21Hosts Dave Pietraszewski and David Pinsof introduce the podcast and welcome guest Annie Wertz, a professor of psychology at the University of California, Santa Barbara. They discuss her academic background, including her time at the Max Planck Institute for Human Development in Berlin, and explore the unique structure of independent research groups funded by the Max Planck Society.
↗ 0:00 – 10:17Host Dave Pietraszewski, David Pinsof, and guest Annie Wertz discuss Wertz's graduate school entry into evolutionary psychology. Wertz explains how she started interested in folk biology and theory of mind—defined as understanding that other people have mental states like beliefs and desires—before meeting Lita Cosmides at UCSB, which led her to adopt an adaptationist approach to studying the mind.
↗ 12:01 – 18:39Hosts Dave Pietraszewski and David Pinsof discuss the prevalence of amateur and overconfident approaches to evolutionary psychology. With guest Annie Wertz, they compare the hidden complexities of evolutionary theory and developmental research to other scientific disciplines, noting how abstract frameworks often lead people to underestimate the rigorous training required.
↗ 24:03 – 29:11Host Dave Pietraszewski, David Pinsof, and guest Annie Wertz discuss Wertz's transition from studying theory of mind in graduate school to investigating human infant cognition regarding plants during her postdoc with Karen Wynn. Wertz explains how frustration with faddish academic topics and an adaptationist approach inspired her to pursue novel research questions about how humans learn about plants.
↗ 36:06 – 45:06Annie Wertz reviews prior developmental literature on children's intuitive biology and explains how an evolutionary, adaptationist perspective highlights the fundamental differences in how humans interact with plants versus animals. Wertz notes that unlike mobile animals, plants are stationary, meaning the behavioral strategies and cognitive mechanisms required to avoid plant hazards like toxins or rashes differ significantly from those for animal threats.
↗ 45:06 – 48:07Hosts Dave Pietraszewski and David Pinsof discuss with guest Annie Wertz the evolutionary significance of plants for humans. They explore how plants serve as a fundamental, high-stakes selection pressure in ancestral environments, noting that despite modern perceptions of plants as mere background wallpaper, dealing with plant resources and avoiding their toxic compounds has shaped human cognitive systems.
↗ 48:07 – 56:35Annie Wertz explains the design features of human plant-processing systems, highlighting that omnivorous diets and toxic secondary compounds in plants make individual trial-and-error learning dangerous or fatal. Because many staple plant foods require complex processing and cooking, these conditions create strong evolutionary pressures for social learning mechanisms to acquire local survival knowledge from others.
↗ 56:36 – 1:00:10The speakers examine whether the specific cognitive mechanisms dedicated to plant learning and toxin avoidance constitute an evolutionary module. Annie Wertz clarifies that she views these as overlapping systems for plant learning rather than rigid Fodorian modules, unpacking historical misconceptions around the term modularity.
↗ 1:08:50 – 1:12:11In this discussion with host Dave Pietraszewski, guest Annie Wertz explains why traditional Fodorian modularity is an inadequate framework for studying plant-foraging adaptations. Instead of assuming rigid boundaries, the speakers emphasize an adaptationist perspective focused on how the mind solves specific, overlapping adaptive problems related to stationary resources and learning.
↗ 1:12:11 – 1:18:29The speakers discuss how evolution and learning are not mutually exclusive, highlighting that evolved adaptations can specifically design learning systems. Annie Wertz then elaborates on the vast utility of plants in hunter-gatherer societies, extending far beyond food to encompass material culture, medicine, and chemical uses.
↗ 1:18:29 – 1:24:12Dave Pietraszewski, David Pinsof, and Annie Wertz discuss how humans process plants for food and material construction, comparing modern specialized labor with ancestral hunter-gatherer repertoires. The speakers explore artifact psychology, highlighting how interacting with natural materials like wood and animal parts reveals evolved behavioral motor repertoires that persist despite modern environments.
↗ 1:24:12 – 1:30:00Annie Wertz, Dave Pietraszewski, and David Pinsof discuss food neophobia in children, exploring how categorization abilities and subtle visual details influence what toddlers perceive as food. They also share childhood anecdotes about encountering toxic plants like poison oak and discuss plant chemical defenses.
↗ 1:48:14 – 1:53:47The hosts and Annie Wertz reflect on the importance of merging developmental psychology with evolutionary approaches to understand human learning and infant cognition. They conclude by discussing Wertz's lab and wrapping up the podcast episode.
↗ 1:53:47 – 1:57:54Hosts Dave Pietraszewski and David Pinsoff introduce the episode by poking fun at their own conversational style and introducing David's new preprint theory of humor. Dave Pietraszewski expresses his admiration for David's unique background combining professional comedy and evolutionary psychology, setting up a deep dive into the evolutionary mysteries of humor.
↗ 0:00 – 6:06The hosts discuss David's professional background bridging comedy and data science at Cards Against Humanity. They transition into the core theoretical concept of coordination games, detailing how mutual alignment, smooth social interaction, and what people call vibing form the basis for understanding social behavior and coordination.
↗ 6:06 – 12:00Dave Pietraszewski and David Pinsof discuss coordination games, explaining how mutual benefit and common knowledge are essential for human cooperation, group formation, and social organization, referencing historical examples and social media behavior.
↗ 12:01 – 18:01The hosts examine how language, social status, and daily interactions rely on complex coordination games, suggesting that humor and laughter evolved to signal and diffuse the costs of accidental mix-ups and miscommunications.
↗ 18:01 – 24:01Hosts Dave Pietraszewski and David Pinsof discuss linguistic mix-ups and misunderstandings, such as confusing temperature with arousal or mixing up phrases, arguing that natural selection favors systems to detect these errors. They propose that 'temptingness' or confusability is a core dimension of humor, where more understandable and similar misinterpretations generate greater comedic effect.
↗ 24:01 – 29:50David Pinsof and Dave Pietraszewski examine the second component of humor: costliness, defined as the conceptual distance or misalignment between mixed-up elements. Using examples from Mitch Hedberg, Dave Chappelle, and the film Rat Race, they argue that extreme humor is driven by high-stakes, catastrophic mix-ups that function like supernormal stimuli.
↗ 29:51 – 36:04Dave Pietraszewski and David Pinsof discuss the evolutionary psychology of humor, proposing that humor is an adaptation selected for navigating social interdependence and avoiding costly coordination failures. They examine how a sense of humor allows individuals to detect and anticipate mix-ups, acting as a cognitive warning system that enhances social fitness.
↗ 36:04 – 42:12The hosts explore the role of laughter in repairing initial coordination costs and establishing common knowledge following a social misunderstanding. They also examine how sharing humor and appreciation for jokes signals social intelligence, helping individuals choose high-value coordination partners and mates.
↗ 42:12 – 48:09Dave Pietraszewski and David Pinsof discuss how humor functions to filter individuals and coordinate on status games. They examine Flamson and Barrett's encryption theory of humor, explaining how jokes encode background and cultural knowledge to allow subcultural affiliation and covert social exclusion without causing overt interpersonal conflict.
↗ 48:09 – 51:47The hosts explore developmental aspects of humor, including children's use of nonsense words and scatological themes like poop during potty training. They connect these developmental milestones to self-conscious emotions and analyze embarrassment as an ambiguous social situation where an audience struggles to coordinate on whether a person's status has fallen.
↗ 51:48 – 1:00:13Dave Pietraszewski and David Pinsof discuss how embarrassment functions to preserve social status after a mix-up through blushing and laughter. They examine adolescent shyness, what happens when embarrassment turns into humiliation or shame, and how Andy Kaufman's performances playfully manipulate these social dynamics.
↗ 1:00:13 – 1:06:54The speakers explore mirth and amusement as mechanisms that deactivate negative emotions like anger and fear to nullify the costs of mix-ups. They analyze how humor acts as a political weapon of anti-seriousness by disrupting coalitions, and how mockery is used during political competition to frame rivals as poor social partners.
↗ 1:06:55 – 1:12:14Dave Pietraszewski and David Pinsof discuss how political satire highlights hypocrisy and moral confusion through shared social norms. They then examine comic timing, explaining how subtle micro coordination games involving volume, pacing, gestures, proximity, tone, and timing form the toolkit of comedic actors and performances.
↗ 1:12:14 – 1:19:02Dave Pietraszewski and David Pinsof explore why creepy smiles, evil laughs, and scary clowns evoke deep dread by examining the adaptive function of mirth. They explain that mirth deactivates fear, empathy, and cost-processing, making a mirthful individual uniquely menacing, unpredictable, and impossible to negotiate with.
↗ 1:19:02 – 1:24:15Dave Pietraszewski and David Pinsof discuss the social benefits of affiliating with funny individuals, such as easier coordination and cultural alignment, and explore how absurdism and non-literal mix-ups generate humor without requiring exact source identification.
↗ 1:24:15 – 1:31:51The hosts examine why comedy ages faster than drama due to its heavy reliance on culturally relative coordination games and social norms, and they analyze physical slapstick as coordination failures and harmless physical mix-ups.
↗ 1:31:51 – 1:36:18Dave Pietraszewski and David Pinsof discuss how slapstick comedy relies on coordination failures surrounding physical injury and frame shifts between viewing humans as conscious beings versus physical objects. They examine lowbrow humor, physical expectations, rhythmic movement violations, and the evolutionary psychology of humor theories.
↗ 1:36:18 – 1:42:34In the concluding segment, Dave Pietraszewski and David Pinsof wrap up the episode with housekeeping reminders, banter about clichéd quotes, and a satirical take on the evolutionary psychology of inspirational sayings and cave paintings.
↗ 1:42:35 – 1:45:43The speakers explore why human communication requires advanced theory of mind capabilities. Drawing an analogy to vision science and depth perception, Thom Scott-Phillips and the hosts address the objection that ordinary people do not consciously perform complex mental calculations, explaining that phenomenological simplicity does not imply simple underlying cognitive processes.
↗ 8:33 – 12:04Host Dave Pietraszewski and guest Thom Scott-Phillips discuss why tasks that feel simple to humans, such as object recognition, navigation, and humor, actually require extensive evolutionary history and common sense knowledge. In contrast, computational tasks like mathematics involve abstraction and are easier for artificial intelligence.
↗ 12:04 – 13:49Dave Pietraszewski, David Pinsof, and guest Thom Scott-Phillips discuss whether language and its underlying grammatical constructions are evolutionary adaptations. They connect this to a broader paradigm shift in cognitive science, moving away from viewing humans solely as solitary rational agents toward understanding us as deeply social animals navigating complex social environments.
↗ 24:05 – 30:53Host Dave Pietraszewski, David Pinsof, and guest Thom Scott-Phillips discuss how art functions similarly to language on a continuum of communication. They explore how both art and language raise expectations of relevance, prompting audiences to infer the intentions and meanings behind stimuli, akin to playing a cognitive puzzle or game.
↗ 36:06 – 44:19The speakers examine the openness and ambiguity of art as a deliberate design feature rather than a flaw. They discuss the severe social and Darwinian consequences of violating principles of relevance, noting how effective communication and linguistic coordination impact social partnerships and mate selection.
↗ 44:19 – 48:09Guest Thom Scott-Phillips and host David Pinsof discuss the evolution of human communication, focusing on the evolutionary pressure of relevance and the inherent trade-offs and reputational costs associated with eliciting and competing for attention.
↗ 48:09 – 53:51Host David Pinsof and guest Thom Scott-Phillips examine whether non-evolutionary psychology is possible, arguing that all psychological research inherently relies on assumptions about evolutionary mechanisms and functions.
↗ 53:52 – 1:00:10Dave Pietraszewski, David Pinsof, and guest Thom Scott-Phillips discuss why evolutionary psychology is better understood as adaptationist cognitive science, exploring selection pressures, the evolutionary ecology of the human mind, and how misleading field names perpetuate false dichotomies between biology and culture.
↗ 1:00:10 – 1:03:54Dave Pietraszewski and David Pinsof introduce the podcast, welcome anthropology professor Mike Gurven from UC Santa Barbara, and discuss academic departmental structures and the upcoming release of Gurven's new book, Seven Decades.
↗ 0:00 – 6:08Mike Gurven explains the premise of his book Seven Decades, arguing that the human body is evolved to last around seventy years, and addresses the common misconception that our ancestors routinely died by age thirty-five.
↗ 6:08 – 12:00Host Dave Pietraszewski, David Pinsof, and guest Mike Gurven discuss the evolutionary history of human longevity, challenging the notion that old age is exclusively a modern problem. They explore how life stages, including middle and older age, are evolved species-typical designs that offer untapped potential rather than being mere burdens or periods of decay.
↗ 12:00 – 17:10Mike Gurven explains his motivation for writing a book on aging that synthesizes broader evolutionary insights rather than offering quick health hacks or molecular biology tips. The speakers examine how studying non-industrial and hunter-gatherer populations provides crucial context on aging, heart disease, and physiological health that standard Western medicine often overlooks.
↗ 17:10 – 24:01The hosts and Mike Gurven explore the lifestyle factors behind the Tsimane and Moseten populations' low rates of heart disease. They examine the role of continuous light-to-moderate physical activity, daily step counts, and the potential impacts of modernization and new labor-saving technologies.
↗ 28:53 – 36:01Dave Pietraszewski, David Pinsof, and guest Mike Gurven discuss how built environments, urban planning, and walkable communities impact physical activity, health, and cardiovascular wellness. They contrast US car culture with European cities and examine the public health benefits of making active, healthy choices easier at the population level.
↗ 36:02 – 43:04Dave Pietraszewski, David Pinsof, and guest Mike Gurven discuss the concept of retirement and how human evolutionary history shapes our psychological desire to remain socially relevant, productive, and avoid being a burden. They examine whether modern economic and cultural structures make older adults obsolete compared to small-scale foraging societies.
↗ 48:04 – 55:08Mike Gurven responds to the pessimistic take on elder obsolescence by comparing modern attitudes with ethnographic data from hunter-gatherer societies. The speakers differentiate between the young-old and very elderly, discussing how contributions continue across different life stages despite rapid technological and cultural shifts.
↗ 55:10 – 1:00:05Dave Pietraszewski, David Pinsof, and guest Mike Gurven discuss creative community solutions that leverage the wisdom and experience of older adults through mentorship and cooperative programs. The speakers address concerns about moral hazard and free riding, emphasizing that people generally want to feel like contributing members of society when given accessible opportunities and proper coordination.
↗ 1:00:05 – 1:05:52David Pinsof and guest Mike Gurven explore the demographic transition puzzle where modern wealth and abundance correlate with declining fertility rates rather than a population boom. They examine how human capital investment, delayed reproduction, and perceived economic requirements influence family size from an evolutionary and life history perspective.
↗ 1:05:52 – 1:12:07Dave Pietraszewski, David Pinsof, and guest Mike Gurven discuss the psychological and economic costs of raising children in modern, isolated societies compared to small-scale traditional societies like the Ache and Tsimane, examining how perceived resource requirements and status aspirations influence fertility decisions.
↗ 1:12:08 – 1:17:29The speakers explore how status as a positional good drives luxury expenditures and investment in children's competitiveness. They also examine how structural factors, such as parental leave and childcare policies, impact fertility rates and how evolutionary psychology intersects with economic and social environments.
↗ 1:17:29 – 1:24:09Mike Gurven discusses his initial exploration into measuring personality among the Tsimane, explaining how standard Big Five personality inventories did not neatly map onto small-scale forager societies. Gurven and Dave Pietraszewski explore how behavioral ecology and translation challenges shaped their methodological approach to capturing individual differences.
↗ 1:24:09 – 1:31:19Mike Gurven explains that Tsimane personality structure resembles a constrained 'big two' rather than independent Big Five factors, comparing it to an equalizer with linked bands. The speakers examine how modern socioecological complexity, diverse economic niches, and job variety expand personality differences compared to small-scale societies.
↗ 1:31:19 – 1:36:13Guest Mike Gurven and the hosts discuss how personality structure varies in relation to niche diversity, comparing modern urbanization and streaming media subcultures to ancestral environments. Gurven explains empirical findings on personality correlation structures and developmental inputs.
↗ 1:36:13 – 1:43:47As the interview concludes, the hosts ask Mike Gurven what topics were left unaddressed. Gurven discusses the future of evolutionary social science, the changing dynamics of small-scale societies, and how researchers should study ongoing cultural and demographic shifts rather than hiding them.
↗ 1:43:47 – 1:48:17Guest Dan Williams discusses his overarching philosophical research into why humans hold strange or irrational beliefs, arguing that viewing humans as intensely social animals competing for status and reputation illuminates complex domains like religion and ideology.
↗ 4:45 – 12:01Host Dave Pietraszewski and guest Dan Williams discuss how historical and psychological theories have often overlooked strategic social motivations, such as status competition, reputation management, and propaganda, in shaping human beliefs and behaviors. They explain that because social signaling can carry negative inferences, people often conceal their signaling motives under the cover of darkness.
↗ 12:01 – 14:47The speakers examine self-deception, contrasting inward-facing Freudian defense mechanisms with externalized social motivations like propaganda and reputation management. Dan Williams explains why he prefers terms like internalizing propaganda and signaling over self-deception, and the group considers how folk psychology concepts create false paradoxes that can be resolved by looking at mechanistic levels of analysis.
↗ 14:47 – 24:02Dave Pietraszewski, David Pinsof, and guest Dan Williams discuss the psychological distinction between genuine world-modeling beliefs that drive behavior and compartmentalized identity or religious convictions that serve social signaling functions. They explore theoretical frameworks from anthropology and cognitive science, highlighting how cultural narratives and extreme group contexts complicate our understanding of internalized commitment.
↗ 24:02 – 30:54Dan Williams and the hosts examine the challenges of empirically distinguishing between genuine beliefs and strategic social signals. They discuss how natural selection shaped human psychology to navigate deceptive signaling, where behavioral cues rapidly destabilize into costly social games as individuals attempt to convince others of their loyalties.
↗ 30:55 – 36:05Host Dave Pietraszewski and guest Dan Williams discuss the concept of pseudo beliefs, comparing them to biological mimicry where distinguishing fake beliefs from true beliefs is difficult by design. They explore how people can hold social or strategic pseudo beliefs that function as signals, and how individuals might convince themselves or adopt beliefs through second-order psychological mechanisms.
↗ 36:05 – 42:45David Pinsof, Dan Williams, and Dave Pietraszewski examine how advocacy and biased evidence-gathering can lead people to sincerely internalize propaganda or arguments they initially presented for strategic reasons. They debate whether self-deception in persuasion represents an evolutionary design flaw or a functional feature of human reasoning systems.
↗ 42:46 – 48:07Dave Pietraszewski, David Pinsof, and guest Dan Williams discuss whether human belief formation is primarily truth-seeking or driven by social coordination, prestige economies, and cultural signaling. They explore how social pressures shape our convictions, using examples like opinions on public figures, and how difficult it is to separate genuine epistemic trust from conformity.
↗ 48:07 – 57:01Host Dave Pietraszewski asks Dan Williams about his background and what led him to study the evolutionary and strategic functions of belief. Williams shares how reading popular science authors in his youth shaped his worldview, and expresses his initial surprise upon entering academia and discovering that evolutionary approaches to psychology are often stigmatized in the humanities.
↗ 57:02 – 1:00:12Host Dave Pietraszewski and guest Dan Williams discuss why evolutionary cognitive science offers a fruitful framework for studying human psychology. Williams contrasts the traditional 'you can not handle the truth' model of self-deception with an evolutionary perspective focused on advocacy, propaganda, and social influence, explaining why humans often hold distressing or seemingly maladaptive beliefs.
↗ 1:00:12 – 1:06:26Host Dave Pietraszewski opens by discussing expected propagandistic responses and asks guest Dan Williams and co-host David Pinsof about how people react professionally and day-to-day to revealing insights about human bias. Dan discusses biases in modern misinformation research and the defensive reactions from researchers. David and Dave reflect on using humor, writing, and cynicism to navigate hostility toward evolutionary psychology.
↗ 1:12:12 – 1:20:36Hosts Dave Pietraszewski and David Pinsof introduce the episode and guest Karen Kramer, professor of anthropology at the University of Utah. They discuss the unusual nature of human life history, focusing on how humans manage high investment in both survival and reproduction while supporting multiple dependents simultaneously.
↗ 0:00 – 6:22Karen Kramer discusses with hosts Dave Pietraszewski and David Pinsof how viewing children as economic agents rather than financial burdens reshapes demographic perspectives. Examining traditional societies like the Maya and Pume, Kramer explains that while young children take more resources than they produce, older juveniles contribute significantly through alloparenting and skill learning, allowing mothers to manage entire sibling groups.
↗ 12:03 – 19:49Karen Kramer, Dave Pietraszewski, and David Pinsof explore why fertility rates drop in economically developed Western societies compared to traditional contexts. Kramer emphasizes that examining population averages obscures critical behavioral variation, noting how Maya women exercise individual agency by utilizing tubal ligation at the end of their reproductive careers as market integration alters family planning.
↗ 19:49 – 24:04Host David Pinsof and guest Karen Kramer discuss how parents make family planning decisions, examining the demographic transition and how individuals consider future ecological and social landscapes for their children. They explore whether evolved psychological mechanisms support conscious fertility choices across different cultural contexts.
↗ 24:04 – 28:08Host David Pinsof and guest Karen Kramer discuss the foundational concepts of life history theory originating from evolutionary biology. They explore how limited resources like time, energy, and calories are allocated to survival, growth, and reproduction, and how these trade-offs shape childhood development and parenting decisions.
↗ 48:08 – 53:14Hosts Dave Pietraszewski and David Pinsof converse with guest Karen Kramer about human life history, family structures, and whether monogamy or nuclear families represent our species-typical evolutionary baseline. Kramer discusses the cooperative economy of food, maternal-centric ancestral structures, and the evolutionary hurdles associated with male parental investment.
↗ 1:00:13 – 1:07:28Karen Kramer explains the social and organizational prerequisites for male parental care, including paternity confidence and the reduction of male-male competition through coalition-building. The discussion concludes by highlighting the remarkable behavioral and reproductive flexibility that characterizes human societies globally.
↗ 1:07:29 – 1:12:13Guest Karen Kramer shares with hosts Dave Pietraszewski and David Pinsof how she transitioned from archaeology to evolutionary anthropology, driven by a preference for behavioral ecology and origins questions. They discuss how evolutionary perspectives highlight human universals and address contemporary divisiveness.
↗ 1:12:13 – 1:14:45Hosts Dave Pietraszewski and David Pinsof introduce the podcast, discuss their fondness for Halloween, and share a funny parenting anecdote about a daughter's morbid curiosity regarding rotting teeth. They then introduce guest Coltan Scrivner to discuss the evolutionary psychology of horror and morbid curiosity.
↗ 0:00 – 7:06Coltan Scrivner explains his background in anthropology and biology and his research focus on why humans are drawn to threats and negative stimuli. The speakers discuss the evolutionary inputs of the horror genre and why people are fascinated by abandoned places and ancient civilizations.
↗ 7:06 – 12:01Dave Pietraszewski, David Pinsof, and guest Coltan Scrivner discuss why humans are naturally drawn to horror, scary stories, and morbid curiosity. They explore how our evolutionary history makes dangerous situations and threat cues particularly engaging, comparing the psychological drive for scary information to the evolutionary craving for sweet, high-calorie foods.
↗ 12:01 – 20:34The hosts and Coltan Scrivner examine the role of episodic memory in consuming scary narratives and true crime. They discuss how stories provide a Goldilocks middle ground of specific details without obvious bottom-line lessons, allowing people—including women watching true crime to relax—to extract insights about danger, threat avoidance, and pattern recognition.
↗ 20:34 – 24:04Dave Pietraszewski, David Pinsof, and guest Coltan Scrivner discuss how consuming horror and facing dangerous stimuli can reduce fear by increasing preparedness and confidence. They explore the evolutionary perspective of formidability asymmetries, noting how perceived vulnerability to a malicious antagonist elicits fear, and examine how mastering fear might signal competence and deter potential attackers.
↗ 24:04 – 29:56The speakers discuss the Darwinian advantages of mastering fear and signaling formidability, referencing research on gruesomely violent behavior and its impact on perceived size and strength. Finally, Coltan Scrivner proposes an evolutionary definition of the horror genre based on narratives featuring a vulnerable protagonist and a malicious, more formidable antagonist.
↗ 29:56 – 36:04Dave Pietraszewski, David Pinsof, and guest Coltan Scrivner discuss empirical research analyzing film genres using a protagonist vulnerability index. They examine how the asymmetry in formidability between antagonists and protagonists in horror films mirrors predator-prey dynamics in nature, comparing horror tropes to films like Jurassic Park, Terminator 2, and Predator.
↗ 36:04 – 45:56Dave Pietraszewski, David Pinsof, and guest Coltan Scrivner discuss the core categories of morbid curiosity, including dangerous people, violence, body violation, and the supernatural. They explore how zombie narratives tap into these elements, combining contagion, unpredictability, and ancient fears of infection or unknown threats.
↗ 48:04 – 51:25The speakers examine how humans use supernatural explanations as placeholders for causally opaque phenomena, such as disease and murder. They also touch upon evolutionary perspectives on the uncanny valley, how different hominid species might have shaped fear responses, and how children experience the world as naturally more formidable and horrific.
↗ 51:25 – 1:00:05Host Dave Pietraszewski and guest Coltan Scrivner discuss how children naturally gravitate toward scary games, stories, and play, such as the game Mafia. Scrivner and David Pinsof examine whether societal tendencies to shield children from scary fairy tales or morbid topics might backfire by increasing anxiety and hindering emotional coping skills.
↗ 1:00:05 – 1:06:07Coltan Scrivner and the hosts explore how engaging with horror media and true crime can help adults manage generalized anxiety. By providing a controlled, attention-grabbing narrative, scary stories offer an off-ramp for rumination cycles and help individuals practice emotion regulation and cognitive reappraisal.
↗ 1:06:07 – 1:12:08Dave Pietraszewski, David Pinsof, and Coltan Scrivner discuss how anxious individuals frequently seek out horror movies to help regulate or self-medicate their anxiety. Drawing on an evolutionary and Darwinian framework, the speakers explore how fictional scary play allows people to confront perceived threats, build psychological resilience, and master dangerous concepts rather than simply avoiding negative feelings.
↗ 1:12:08 – 1:19:55Host David Pinsof, guest Coltan Scrivner, and host Dave Pietraszewski discuss how consuming scary stories and fiction about pandemics helps people navigate real-world crises by reducing generalized anxiety. They examine how horror fans practice regulating feelings of fear and explore cognitive software-level descriptions of emotion regulation, appraisal, and physiological arousal.
↗ 1:24:12 – 1:31:16The speakers discuss hypotheses about positive feedback loops between fear outputs and inputs, where physiological arousal can be misinterpreted as a cue of danger. They also examine how complex cognitive architectures require emotion regulation to corral cognitive systems and how training ahead of time automates responses during high-stress situations.
↗ 1:31:17 – 1:36:16Dave Pietraszewski, David Pinsof, and Coltan Scrivner discuss how emotion regulation helps calibrate cognitive and physiological responses, comparing it to software adjustment. They explore how narrative storytelling in horror and risky play allows individuals to learn emotional control and how evolutionary perspectives help explain emotional rationality.
↗ 1:36:16 – 1:43:26Coltan Scrivner explains how he began researching morbid curiosity and human fascination with violence and dark phenomena during graduate school. He and the hosts highlight how applying an evolutionary framework reveals overlooked gaps in traditional psychological research regarding human attraction to the macabre.
↗ 1:43:26 – 1:48:19Host Dave Pietraszewski and guest Coltan Scrivner discuss the abundance of research opportunities in evolutionary psychology, contrasting the common criticism of untestable just-so stories with their actual experience of having too many testable predictions. They also explore the Recreational Fear Lab in Denmark, field experiments in haunted houses, and Scrivner's work on true crime and scary play.
↗ 1:48:19 – 1:52:36Hosts Dave Pietraszewski and David Pinsof introduce guest Dr. Keelah Williams, a professor at Hamilton College with both a PhD and a JD. They discuss the intersection of evolutionary psychology and the legal system, noting how psychological science and legal practice sometimes arrive at contrasting conclusions while examining the general resistance of legal institutions to change.
↗ 0:00 – 7:25Dave Pietraszewski, David Pinsof, and guest Keelah Williams discuss how legal institutions emerge from evolved psychological mechanisms to resolve interpersonal conflicts, contrasting this scientific framework with the naive realism often found in traditional legal scholarship.
↗ 12:02 – 17:09Host Dave Pietraszewski, David Pinsof, and guest Keelah Williams discuss how legal systems view motive as legally irrelevant yet prosecutors heavily emphasize it during trials. The speakers critique traditional psychological explanations as circular and propose an adaptationist approach, introducing welfare trade-off ratios as a measure of how much someone values another person's well-being.
↗ 24:04 – 30:12The speakers examine how welfare trade-off ratios explain why certain motives evoke harsher moral judgments than others, using examples like random violence versus targeted conflict. They discuss how evolutionary psychology provides a causal explanation for juror intuitions about perceived threat and future association value.
↗ 30:12 – 36:06Keelah Williams, Dave Pietraszewski, and David Pinsof discuss theoretical implications for empirical tests regarding perpetrators' motives, perceived costs and benefits, and future association value. They explore how high-value individuals, such as a top surgeon or someone with stellar character, might face less harsh punishment despite bad motives, comparing it to being too valuable to convict.
↗ 36:07 – 39:58The hosts and guest Keelah Williams discuss how psychological cues and association values influence juror impartiality during trial proceedings. They examine how attorneys often rely on arbitrary intuitions during jury selection rather than scientific methods, and share personal experiences with avoiding jury duty.
↗ 48:12 – 54:44The speakers explore affordance management theory, examining how human psychology evolved to detect threats and opportunities in the environment. Keelah Williams describes her research on how resource scarcity influences public attitudes toward the death penalty and the decision to rehabilitate versus eliminate serious offenders.
↗ 54:44 – 1:00:13Hosts Dave Pietraszewski and David Pinsof discuss with guest Keelah Williams whether perceived resource scarcity drives public support for capital punishment. They examine whether informing people about the actual legal costs of the death penalty alters their views, noting that explicit cost information does not shift decisions because the mind may operate on deeper intuitive logics.
↗ 1:00:13 – 1:05:11Keelah Williams and the hosts explore global data relating human development indices to capital punishment and discuss how zero-sum competition rather than absolute wealth drives punitive attitudes. They also discuss experimental findings showing that the perceived value of an offender, such as being a skilled hunter, moderates willingness to banish group members during scarcity.
↗ 1:05:12 – 1:12:15Dave Pietraszewski, David Pinsof, and guest Keelah Williams discuss how immigrant characteristics like skill level and religion shape public attitudes and eliminate partisan divides. They explore the evolutionary logic of zero-sum competition, association value, and how demagogues exploit resource perceptions in political rhetoric.
↗ 1:12:15 – 1:15:59Keelah Williams explains her research with Oliver Sung and Steve Newberg on ecology stereotypes, detailing how people infer psychological traits like present- or future-focus from environmental resource scarcity. The speakers discuss how separating race and ecology information can eliminate racial stereotype effects.
↗ 1:15:59 – 1:24:16Dave Pietraszewski, David Pinsof, and guest Keelah Williams discuss the hidden psychological machinery underlying legal and political decisions, exploring how racial categories and family structures act as proxies for tracking environmental ecologies and impulsivity across different cultures and species.
↗ 1:24:16 – 1:30:58David Pinsof and Keelah Williams address skepticism and common critiques of the ecology framework, emphasizing that the theory is fundamentally anti-essentialist, applies across different species, and provides a deeper causal explanation for social class and behavioral stereotypes.
↗ 1:30:58 – 1:36:16Dave Pietraszewski, David Pinsof, and guest Keelah Williams discuss how cultural items and behaviors function to signal class membership, status, and ecology stereotypes such as present-orientedness. They explore intersections with age stereotypes and conclude the scientific discussion by highlighting key readings and researchers in evolutionary approaches to the law.
↗ 1:36:16 – 1:41:53Hosts Dave Pietraszewski and David Pinsof introduce the podcast and their guest, Daniel Sznycer, discussing his research on evolutionary approaches to self-conscious emotions like shame, pride, and guilt. They also joke about name pronunciations and podcast segments.
↗ 0:00 – 2:11Dave Pietraszewski, David Pinsof, and guest Daniel Sznycer discuss existing psychological and clinical research on self-conscious emotions like shame, guilt, and pride. They examine how clinical frameworks view shame as generally pathological and tied to negative mental health outcomes, contrasting this descriptive approach with an adaptationist perspective.
↗ 12:00 – 21:30The hosts and Daniel Sznycer draw an analogy between physical pain and the emotion of shame, arguing that shame functions as an adaptive signal rather than an inherent malfunction. They begin to unpack how the human brain evaluates social value and fitness consequences.
↗ 21:30 – 24:00Host Dave Pietraszewski and guest Daniel Sznycer discuss the evolutionary concept of value, explaining that natural selection designed human value systems to track fitness regularities. They explore how value applies to everything from food to mates and why an evolutionary approach avoids taking instincts for granted.
↗ 24:00 – 29:13The speakers examine how the psychology of value creates adaptive problems when other people evaluate an individual's worth. They discuss how social devaluation impacts fitness, how value magnitudes determine altruistic decisions, and how emotions like shame and envy function to address or minimize social costs.
↗ 29:13 – 36:01Dave Pietraszewski, David Pinsof, and guest Daniel Sznycer discuss the evolutionary function of shame and guilt, comparing the folk intuition that emotions operate in isolation to the scientific view that these feelings act as preventative or reparative mechanisms against social devaluation. They also critique widespread cultural misconceptions surrounding self-esteem interventions.
↗ 36:01 – 45:47The speakers examine how organisms evolve to compute costs and benefits across various domains, such as kin selection and friendship. Daniel Sznycer explains how emotional states function like precise gauges—similar to Geiger counters—tracking fitness-relevant information and value computation to ensure adaptive decision-making.
↗ 45:47 – 48:03Guest Daniel Sznycer discusses with hosts Dave Pietraszewski and David Pinsof how anticipatory shame acts as a mechanism to integrate personal and social payoffs. The speakers examine cross-cultural evidence, including data from small-scale societies and ancient legal codes, demonstrating that the intensity of shame people feel for specific transgressions tracks interpersonal devaluation universally.
↗ 48:04 – 54:46The conversation shifts to pride as the cousin of shame, exploring its role in advertising achievements and demanding increased social valuation. The speakers debate the cultural trope of doing things solely for self-esteem versus the evolutionary reality of calibrating one's self-conscious emotions toward specific audiences and status games.
↗ 54:46 – 1:00:08Host Dave Pietraszewski, David Pinsof, and guest Daniel Sznycer discuss the conceptual structure of value in evolutionary psychology, contrasting interpersonal theories of shame with intrapersonal attributional models. They explore empirical evidence supporting how social emotions function to navigate interpersonal interactions and manage social value rather than merely internalizing self-blame.
↗ 1:00:09 – 1:06:38The speakers examine why shame should not be eliminated, comparing social pain to physical pain as a functional signal from the social environment. Daniel Sznycer, Dave Pietraszewski, and David Pinsof discuss how shame minimizes costs in difficult environments, such as abusive homes, and how malicious dynamics can induce unmerited shame.
↗ 1:06:39 – 1:12:12Dave Pietraszewski, David Pinsof, and guest Daniel Sznycer discuss how the shame system functions as a social Geiger counter, tuned to social evaluation and audience feedback rather than cosmic moral rightness. They examine how shame is self-referential, context-specific, and highly sensitive to interpersonal dynamics.
↗ 1:12:12 – 1:18:39Dave Pietraszewski, David Pinsof, and guest Daniel Sznycer discuss how media choices and behaviors act as signals of intelligence, reputation, and cooperative potential. The speakers explore how self-discipline and delayed gratification function as cues to trustworthiness in social relationships.
↗ 1:24:16 – 1:30:43The hosts and Daniel Sznycer discuss the dual reputation of pride in religious texts and evolutionary psychology. They examine how pride serves as a motivational incentive system for producing valuable societal outcomes, while perceived arrogance reflects social resistance to overclaimed status.
↗ 1:30:43 – 1:36:17Host Dave Pietraszewski, host David Pinsof, and guest Daniel Sznycer discuss the concept of humility, examining whether contemporary calls for humility among academics are genuine or serve as a status-defending strategy. They explore how elite perspectives might be blind to low-bargaining-power groups and how evolved psychologies shape scientific inquiry.
↗ 1:36:17 – 1:40:54The hosts and Daniel Sznycer discuss why wearing unfashionable clothing triggers feelings of shame, connecting fashion to social coordination, intelligence, and changing cultural norms. They also explore the life-history trajectory of shame, noting how aging and dependency alter vulnerability and social evaluation across the lifespan.
↗ 1:40:54 – 1:48:17Host Dave Pietraszewski, David Pinsof, and guest Daniel Sznycer discuss why traveling to exotic locations and possessing deep knowledge of distant geographic and social landscapes confers status. They examine how ancestral adaptations regarding navigation and survival influence modern perceptions of value, and how academic evaluation similarly rewards hard-to-get data over convenient online methods.
↗ 1:48:18 – 1:55:50Hosts Dave Pietraszewski and David Pinsof express deep appreciation for guest Daniel Sznycer and his emotion work, highlighting its evolutionary predictions, cross-cultural data, parsimony, and elegance. They discuss how his valuable insights on shame, guilt, and pride clarify human nature and provide a wonderful framework for understanding behavioral outputs across various contexts.
↗ 2:00:23 – 2:02:38Dave Pietraszewski and David Pinsof introduce the podcast and guest Anne Pisor, who directs the Sociality Lab at Penn State. They discuss traditional views of group boundaries in evolutionary anthropology and social psychology, noting that researchers often view groups as rigid containers for cooperation and conflict, whereas field research reveals much more flexible and cross-boundary interactions.
↗ 0:00 – 5:48Anne Pisor, David Pinsof, and Dave Pietraszewski explore what actually constitutes a group, distinguishing between spatiotemporal clusters from primatology, identity groups, and labels used to scaffold cooperation. They discuss how different definitions of groups often get conflated in behavioral sciences and anthropology.
↗ 5:49 – 12:02Dave Pietraszewski, David Pinsof, and guest Anne Pisor discuss the complexities of group identities, contrasting human susceptibility to group labels with individual agency and entrepreneurial coordination. They examine how groups function in social science frameworks and the challenges of measuring individual psychology versus group dynamics.
↗ 12:02 – 15:35The speakers examine the evolved psychological design for representing groups and tracking how others treat us. Building on John Tooby's 'groups in mind' framework, Anne Pisor and the hosts discuss how human cooperation, risk management, mobility, and the necessity of accessing non-local resources shape inter-group relations and social strategies.
↗ 29:28 – 36:05David Pinsof and Anne Pisor examine the concept of parochial altruism, discussing the nuances of terminology like tribalism, the impact of researcher biases and funding on the study of intergroup conflict, and three key mechanisms driving intergroup behavior: resource competition, cultural institutions, and social valence.
↗ 39:11 – 48:10Dave Pietraszewski, David Pinsof, and guest Anne Pisor discuss how group psychology drives inferences about warmth and competence, examining how ecological costs, social transmission, and boundary propaganda shape inter-group hostility and negative stereotyping.
↗ 48:10 – 54:22The hosts and Anne Pisor explore whether resource competition encompasses social status and political power, discussing evolutionary fitness proxies, ancestral environments, and the salient attractors that trigger human groupishness and perceptions of value.
↗ 54:22 – 1:00:10The hosts and guest discuss how resources such as land, food, and political power are categorized, exploring whether they are inherently zero-sum or shaped by social context, collaboration, and shared interests.
↗ 1:00:11 – 1:08:24The speakers examine jobs as modern resources, discussing the contrast between economic models of labor and the human tendency to view jobs as zero-sum, alongside household risk diversification strategies.
↗ 1:08:25 – 1:12:13Dave Pietraszewski, David Pinsof, and guest Anne Pisor discuss how specific high-paying jobs function as zero-sum resources in household economies. They explore how constrained labor markets lead individuals to make rational decisions under difficult circumstances, drawing parallels to wage labor in Bolivia and Kenya.
↗ 1:12:13 – 1:17:29The hosts and Anne Pisor examine the role of inequality in intergroup relations and parochial altruism. They discuss how shrinking power distances between groups can escalate intergroup tensions and conflict, comparing human social dynamics with non-human primate behavior.
↗ 1:17:30 – 1:24:13The speakers examine intergenerational differences in adopting new trades, languages, and norms, highlighting how young people drive cultural change due to lower sunk costs and flexibility. They discuss how cultural shifts function as zero-sum status games with distinct winners and losers, shedding light on intergenerational friction and contemporary culture wars.
↗ 1:28:41 – 1:36:14Guest Anne Pisor discusses her academic background with hosts Dave Pietraszewski and David Pinsof, explaining how she transitioned from undergraduate studies in psychology and anthropology into evolutionary behavioral sciences and fieldwork in the Amazon. She also shares how her field experiences led her to combine basic science with applied work on climate change and natural resource management.
↗ 1:36:15 – 1:41:29The hosts and guest Anne Pisor discuss balancing academic and industry roles, the value of academic publishing for driving intellectual progress compared to other formats like blogging, and concluding thoughts on their engaging conversation about evolutionary behavioral sciences and ongoing research connections.
↗ 1:41:31 – 1:46:51Hosts Dave Pietraszewski and David Pinsof introduce guest Bret Beheim from the Max Planck Institute for Evolutionary Anthropology in Leipzig. They discuss the concept of network-based diffusion analysis, examining how measurable cultural traits, behaviors, and technologies spread through human and animal populations over time.
↗ 0:00 – 7:09Dave Pietraszewski, David Pinsof, and guest Bret Beheim discuss how mathematical models can be applied across vastly different scientific domains, comparing the diffusion of heat, genes, and cultural practices to demonstrate the unifying power of quantitative reasoning in evolutionary behavioral sciences.
↗ 12:06 – 15:18Bret Beheim explains the historical intersection of Darwinian evolution and Mendelian inheritance, detailing how mathematical population models allow scientists to isolate specific forces like selection, migration, drift, and mutation to study distributions of traits over time.
↗ 15:19 – 24:07Host Dave Pietraszewski, David Pinsof, and guest Bret Beheim discuss the concept of cultural distance in cultural evolution, examining how researchers attempt to quantify similarities and differences between norms or societies using datasets like the World Values Survey and connecting these measures to biological distance metrics.
↗ 24:07 – 28:22Dave Pietraszewski, David Pinsof, and guest Bret Beheim discuss how experimental psychology and anthropological fieldwork complement each other. While psychologists control variables in lab settings to study the mind, anthropologists and formal theorists provide quantitative frameworks and data on real-world behavior, helping researchers navigate infinite observational possibilities and refine theoretical models.
↗ 36:08 – 40:22Dave Pietraszewski, David Pinsof, and Bret Beheim discuss how evolved psychologies interact with cultural traits like shared sports teams to influence cooperation. They examine the methodological challenges of measuring cultural distance across various domains, comparing unidimensional metrics to biological analogies such as whale classification.
↗ 48:08 – 53:39Bret Beheim and the hosts explore the concept of FST as applied to both genetics and culture, noting that humans show remarkably low genetic differentiation alongside high cultural variability, leading to the description that genes are smooth while culture is crunchy.
↗ 53:40 – 1:00:10Bret Beheim discusses his undergraduate experiences at UC Santa Barbara, where he studied under figures like Don Simons and John Tooby, before pursuing graduate studies at UC Davis focusing on cultural evolution and modeling.
↗ 1:00:10 – 1:04:14The speakers examine the historical relationship and perceived division between evolutionary psychology and cultural evolution, noting how both fields have increasingly overlapped while discussing the impact of WEIRD samples in psychological research.
↗ 1:04:15 – 1:12:13Dave Pietraszewski, David Pinsof, and guest Bret Beheim examine the limitations of sample diversity critiques and introduce the evolutionary psychology concept known as the jukebox model. Originally proposed by Barkow, Cosmides, and Tooby, the metaphor illustrates how geographic variation in behavior can emerge from environmental triggers rather than cultural transmission, representing what is known as evoked culture.
↗ 1:12:14 – 1:18:55Dave Pietraszewski, David Pinsof, and guest Bret Beheim discuss whether pedestrian and driving behaviors, such as waiting at red lights, are driven by internalized social norms or rational cost-benefit calculations. They compare cross-cultural differences in traffic rules, policing environments, and coordination failures across cities like Berlin, Los Angeles, and Connecticut.
↗ 1:24:16 – 1:31:58David Pinsof proposes a controversial view that most culture is not vertically transmitted values, but rather an emergent Hayekian outcome of individuals pursuing self-interest and local goals. Bret Beheim responds by discussing cultural evolution models, arguing that norm psychology acts as a cognitive shortcut to reduce the heavy costs of constant attention and calculation.
↗ 1:31:59 – 1:36:22Dave Pietraszewski, David Pinsof, and guest Bret Beheim discuss how cultural learning, economic games, and norm adherence interact with cost-benefit calculations. The speakers explore whether following social norms is driven purely by transmitted cultural rules or by rational individual cost-benefit analyses, touching upon evolved norm psychology and social coordination equilibria.
↗ 1:36:22 – 1:40:26The speakers analyze a famous economic study from an Israeli daycare where introducing a financial fine for late pickups paradoxically increased tardiness. They discuss how monetary penalties shift social interactions into commercial exchanges and examine how impression management, reputational costs, and internal audience simulation shape human prosocial behavior and norm compliance.
↗ 1:40:27 – 1:48:23Dave Pietraszewski, David Pinsof, and guest Bret Beheim discuss how cost-benefit analyses, social costs, and cultural transmission intersect. Beheim explains how cognitive heuristics might evolve to help individuals learn local behavioral coordination and social sanctions, and the hosts discuss wrapping up the interview.
↗ 1:48:23 – 1:51:34Bret Beheim describes his work at the Max Planck Institute for Evolutionary Anthropology in Leipzig, detailing their focus on human behavior, ecology, culture, and longitudinal field data like the Chimani Project. The speakers then explore the cultural evolution of games such as Go, artificial intelligence breakthroughs, and the psychology of status games.
↗ 1:51:35 – 2:00:25Bret Beheim discusses with the hosts how negative frequency dependence operates in strategic games like chess, poker, and Go, where players avoid popular moves to remain unpredictable. They also explore how such strategic interactions shape broader evolutionary dynamics and touch upon high-stakes match controversies.
↗ 2:00:25 – 2:02:47Hosts Dave Pietraszewski and David Pinsof introduce the podcast and preview their guest, Dr. Zach Garfield, an expert on leadership, followership, and cultural variation. The hosts discuss how evolutionary approaches can reframe everyday concepts like following the leader, leading into Garfield's academic background and previous work at the Institute for Advanced Study in Toulouse.
↗ 0:00 – 4:34Zach Garfield joins the conversation to discuss how food sharing, feasting, and the generation of resource surpluses contribute to social status and leadership. The speakers explore the balance between benefit-generating pro-social strategies and coercion or fear-based dominance, noting that ecological constraints and outside options heavily influence leadership dynamics across different human societies.
↗ 4:34 – 12:03Dave Pietraszewski, David Pinsof, and guest Zach Garfield discuss the cultural evolution of leadership, exploring how economic control in subsistence societies transitions into coercive, hereditary chiefdoms and state-level societies. They analyze leadership through a market-like lens, where leaders act as monopolies providing coordinated services such as defense, mediation, and religion while suppressing potential competitors.
↗ 12:03 – 19:19Zach Garfield details his research on status hierarchies, punishment, conflict resolution, and social learning, explaining how leadership underpins these downstream behavioral phenomena. He and the hosts discuss the Omo Valley Research Project in southwest Ethiopia, highlighting how agro-pastoralist communities and ongoing socioeconomic transitions provide critical insights into human behavior and market integration.
↗ 19:19 – 24:06Host Dave Pietraszewski and guest Zach Garfield discuss the cultural and linguistic diversity of southwestern Ethiopia, examining how the region's unique history and subsistence-based societies offer rare opportunities for anthropological research. They contrast day-to-day life and social institutions in these communities with modern market-integrated environments.
↗ 24:06 – 28:58Guest Zach Garfield and hosts discuss how young individuals in pastoralist communities evaluate economic strategies, weighing the long-term benefits of traditional lifestyles against market-based opportunities. Garfield explains that pastoralism often pays off in later life through accumulated wealth and retirement, which reinforces cultural traditions, though environmental pressures and changing incentives can create family conflict.
↗ 36:10 – 43:46The speakers examine family tensions arising when children deviate from traditional expectations to pursue market strategies or education. They then transition into discussing the anthropological and evolutionary science of leadership, contrasting Western business school archetypes with broader, more diverse forms of leadership studied in small-scale societies.
↗ 43:47 – 48:11Host Dave Pietraszewski, David Pinsof, and guest Zach Garfield discuss the limitations of traditional leadership studies and propose a broader, scientifically grounded definition of leadership as disproportionate influence within any social group or context.
↗ 48:11 – 54:18The speakers examine how human intuitive psychology evaluates leaders through aggregate attributes and manifolds, comparing micro-status hierarchies within group niches to broader political and social conflicts.
↗ 54:18 – 1:00:14Host David Pinsof, Dave Pietraszewski, and guest Zach Garfield discuss how political leaders manipulate perceptions of environmental and intergroup threats to gain power. Garfield explains that politicians instinctively emphasize outgroup threats, aligning with evolved human psychology, which rewards narratives of conflict and free riders in the political marketplace.
↗ 1:00:14 – 1:03:24Zach Garfield details his work with Ed Hagan on the dominance-prestige framework, proposing that leaders provide valuable cognitive and computational services. They help followers reduce decision-making costs using their expertise and neural capital, creating a mutually beneficial arrangement known as joint utility improvement.
↗ 1:03:24 – 1:12:15The speakers discuss how concepts like intelligence and leadership are driven by the perception of differences rather than a domain-general mental substance. Guest Zach Garfield explains neural capital as valuable information accumulated over a lifetime, comparing it to physical capital and linking it to social influence, bargaining power, and leadership in social marketplaces.
↗ 1:12:15 – 1:15:55The hosts and guest Zach Garfield discuss the role of impartiality in leadership and conflict resolution. They explore how divination and rituals serve as mechanisms for leaders to make objective decisions, maintain social order, and pass on responsibility while minimizing personal status risks and avoiding charges of favoritism.
↗ 1:24:16 – 1:34:18Guest Zach Garfield discusses with hosts Dave Pietraszewski and David Pinsof how his research team maps cross-cultural friendships and social networks across rural villages and ethnic groups. Garfield also explains the philanthropic branch of their organization, which funds higher education and living expenses for motivated students from these communities.
↗ 1:36:16 – 1:43:28Hosts Dave Pietraszewski and David Pinsof introduce the podcast, discuss their comedic use of parentheses and scare quotes, and introduce guest Dr. Brooke Scelza, a biological anthropologist from UCLA who studies the Himba pastoralists in Namibia, setting up a broader discussion on mating, jealousy, parental investment, and the replication crisis in evolutionary social sciences.
↗ 0:00 – 3:18Guest Brooke Scelza discusses her research with the Himba people in Namibia, explaining how she initially went to study cooperative breeding but discovered widespread patterns of concurrent formal and informal sexual partnerships. Scelza and the hosts explore how studying a population at the opposite end of the typical Western spectrum helps avoid essentializing and highlights flexibility in mating systems.
↗ 3:24 – 8:10Brooke Scelza describes how modernization, droughts, and the introduction of cell phones and store-bought goods have altered Himba society over 15 years. The conversation examines double descent and matrilateral inheritance, where wealth flows from mother's brother to sister's son, illustrating how reproductive strategies and paternity uncertainty are deeply tied to intergenerational resource flows.
↗ 8:10 – 12:02Host Dave Pietraszewski and guest Brooke Scelza discuss how shifts toward a cash economy may impact women's autonomy and paternity certainty. Scelza explains that despite high rates of extra-pair paternity in the studied community, men still maintain strong social norms and behavioral patterns of paternal investment toward children regardless of biological relatedness.
↗ 12:02 – 17:27David Pinsof asks how community members determine biological paternity when it can be ambiguous. Brooke Scelza explains the various mechanisms people use—including physical resemblance, spousal communication, gossip, and periods of absence—and details how genetic analysis revealed high accuracy and intentional reporting biases in the community.
↗ 17:27 – 24:05Dave Pietraszewski, David Pinsof, and guest Brooke Scelza discuss how pastoralist societies manage paternity uncertainty, spousal separation, and norms around treating children equally. They examine how resource transfers, cash, and covert gifts operate between marital partners and extramarital boyfriends within these complex cultural systems.
↗ 24:05 – 31:02Dave Pietraszewski, David Pinsof, and Brooke Scelza discuss how reciprocal altruism and robust social norms support non-exclusive mating systems. They explore children's awareness of parental investment, the existence of behavioral biases versus strict norms, and how social relationships shape father-child dynamics.
↗ 36:07 – 44:01David Pinsof and Brooke Scelza examine how her findings on sexual versus emotional jealousy among the Himba fit into broader evolutionary psychology frameworks, highlighting cross-cultural variations and the limitations of focusing solely on sex differences.
↗ 44:03 – 48:12Guest Brooke Scelza discusses with hosts Dave Pietraszewski and David Pinsof her cross-cultural research on jealousy regarding sexual versus emotional infidelity. While testing populations such as the Himba, Chimane, and Hadza, they found that variation in the severity of jealousy responses was heavily driven by levels of paternal investment rather than universal sex differences alone.
↗ 48:12 – 53:11The speakers discuss the broader theoretical implications of studying behavioral variation rather than solely focusing on universal sex differences. They examine how cultural systems reinforce evolutionary logic, noting that flexible cost-benefit calibrations, such as investment-dependent jealousy, represent sophisticated evolved design rather than being antithetical to evolutionary theory.
↗ 53:11 – 1:00:12Dave Pietraszewski, David Pinsof, and guest Brooke Scelza discuss how human behavioral ecology keeps psychological research grounded by examining ecological constraints, foraging costs, and real-world adaptive problems rather than relying solely on counterintuitive findings. They explore the integration of cultural evolution, norms, and behavioral ecology across academic traditions.
↗ 1:00:12 – 1:05:33The speakers examine whether evolutionary psychologists are successfully integrating perspectives from behavioral ecology and cultural evolution, or if fields remain siloed. They emphasize the necessity of cross-cultural anthropology to test assumptions about universal human psychology and avoid biases stemming from Western populations.
↗ 1:05:35 – 1:12:13Dave Pietraszewski, David Pinsof, and guest Brooke Scelza discuss the limitations of traditional cross-cultural psychology research, arguing against using other cultures merely as a cudgel to prove universals. Instead, they emphasize understanding human behavioral flexibility, moving past false dichotomies, and integrating behavioral ecology with evolutionary psychology to study how minds adapt to diverse contexts.
↗ 1:12:13 – 1:18:06Host Dave Pietraszewski and guest Brooke Scelza discuss the differences in field size and integration between human behavioral ecology and evolutionary psychology. They examine how the public's fascination with sex and dating leads to oversimplified pop psychology interpretations, and the challenges educators face when students apply these folk theories to personal relationships.
↗ 1:24:15 – 1:28:30The speakers discuss the manosphere, mating market struggles, and how young people encounter distorted evolutionary claims online. Brooke Scelza argues that scientists have a responsibility to actively correct misinterpretations of their research—such as misunderstandings around cuckoldry—rather than blaming the public for oversimplifying complex data.
↗ 1:28:30 – 1:36:18Host Dave Pietraszewski and guest Brooke Scelza discuss the differences and similarities between men's and women's status-seeking behaviors. Scelza highlights how women's status often relies on understated social qualities like generosity and connectivity rather than conspicuous physical traits, challenging traditional evolutionary perspectives on network structures.
↗ 1:36:18 – 1:39:53Hosts Dave Pietraszewski and David Pinsof introduce their guest, Dr. Hannes Rusch, a behavioral economist and independent research group leader at the Max Planck Institute. The hosts praise Rusch's precise, mathematical approach to abstract concepts. Rusch explains that his research transitioned from the well-studied evolution of cooperation to the darker, less-studied aspects of human nature, specifically human exploitation and intergroup conflict.
↗ 0:00 – 7:45Host Dave Pietraszewski and guest Hannes Rusch discuss the three-pillar research project on exploitation, which includes microeconomic theory, behavioral experiments, and applied archive data. They explore how mathematical models conceptualize exploitative relationships like slavery by examining how a dominant party constrains a victim's outside options and reduces wages.
↗ 12:04 – 17:06The speakers draw parallels between formal models of exploitation and everyday interpersonal dynamics, abusive relationships, and economic monopolies. Hannes Rusch explains that exploitative strategies often involve luring victims through deception before resorting to confinement or punishment, noting that deception serves as a cost-effective alternative to violence.
↗ 17:06 – 24:08The speakers debate whether exploitation can occur between symmetrical partners, discussing whether deception serves as a primary tool when physical threats or power asymmetries are absent. They also explore connections to cheater detection and whether cheating represents a form of deception within social interactions.
↗ 33:11 – 36:10Dave Pietraszewski, David Pinsof, and guest Hannes Rusch discuss psychological biases in detecting and rationalizing exploitation. They examine whether exploiters consciously recognize unfair advantages or use post hoc justifications, touching on economic disparities like the gender pay gap and how outside options influence perceptions of fairness.
↗ 36:10 – 42:07The speakers explore collective action and intergroup exploitation, discussing whether groups require a moral or religious pretext or if leaders simply test the waters for coordination. Hannes Rusch and the hosts mention the mobbing game as a framework for understanding how groups coordinate to impose costs and extract benefits.
↗ 42:08 – 48:13Dave Pietraszewski, David Pinsof, and guest Hannes Rusch discuss how mobbing behavior acts as a coordination game rather than reflecting inherent animosity toward specific groups. They examine signaling deterrence, the witch hunt game model, and how ecological cues of paranoia can escalate group conflict.
↗ 48:13 – 51:36David Pinsof and Hannes Rusch transition from discussing exploitation to examining group memberships and the in-group out-group literature. Rusch describes his replication and longitudinal extension of experimental paradigms measuring individual differences in groupy behavior and group markers.
↗ 1:00:17 – 1:06:07Dave Pietraszewski, David Pinsof, and guest Hannes Rusch discuss whether individual differences in "groupiness" or coalitionality are stable over time. Rusch explains that while aggregate distributions of group favoritism types replicate, individual measures across different time points show low correlation, suggesting that coalitional behavior reflects flexible cognitive settings responding to social context rather than fixed personality traits.
↗ 1:12:18 – 1:20:34Hannes Rusch shares his recent research interests spanning the economics of crime and dark human behaviors, alongside a longstanding fascination with heroism and high-stakes altruism. Rusch and the hosts discuss the limitations of standard economic games like dictator games in testing evolutionary theories of inclusive fitness and altruism.
↗ 1:20:36 – 1:24:21Host Dave Pietraszewski and guest Hannes Rusch discuss the definition of heroism as high-stakes altruistic behavior in natural contexts, emphasizing the severe personal costs involved. They draw parallels between risky heroism and Ed Hagan's work on suicidality and costly signaling as bargaining strategies.
↗ 1:24:21 – 1:28:26Host David Pinsof, Dave Pietraszewski, and guest Hannes Rusch explore whether bravery can be formalized using coordination games like the stag hunt. They discuss the distinction between bravery and recklessness, military selection against pure fearlessness, and how institutions use honors like the Medal of Honor as rhetoric to encourage group-beneficial sacrifice.
↗ 1:28:26 – 1:36:23Dave Pietraszewski, David Pinsof, and guest Hannes Rusch discuss how in-group favoritism and hostility can be artificially manipulated by leaders. The speakers examine how conflicts do not permanently destroy human relationships, noting that deception and false flags are often cheaper mechanisms of exploitation than outright coercion or imprisonment.
↗ 1:36:23 – 1:42:46Hannes Rusch shares how he discovered evolutionary theory through philosophy, eventually transitioning into economics where evolutionary perspectives are less central compared to social norms and institutions. The hosts and guest discuss levels of analysis, bridging individual cognitive architecture with population-level cultural evolution.
↗ 1:42:46 – 1:48:27The speakers discuss the role of economics and formal modeling in studying human behavior, institutions, and fairness. They examine how mathematical precision helps sharpen communication, prevent reinvention of existing models, and integrate insights from evolutionary psychology and economics.
↗ 1:48:27 – 1:53:06Dave Pietraszewski, David Pinsof, and guest Cari Goetz introduce the podcast episode discussing love, regret, and evolutionary psychology. They explore why human mating dominates public perception and academic literature in evolutionary psychology, debating whether this heavy focus benefits or harms the scientific field.
↗ 0:00 – 7:29Host Dave Pietraszewski, host David Pinsof, and guest Cari Goetz discuss the strengths of evolutionary social science, emphasizing cross-cultural research and the concept of the mind as a collection of adaptations. They examine how mating psychology is often misunderstood when people incorrectly assume conscious access to functional reasons behind behaviors.
↗ 12:02 – 17:46Host Dave Pietraszewski, guest Cari Goetz, and host David Pinsof discuss mating as an ultimate cooperative relationship involving heavy resource investments. They explore how strategic self-deception and mutually beneficial broadcasted commitment can create a positive feedback loop, drawing parallels to arranged marriages and romantic myths.
↗ 24:03 – 30:13Dave Pietraszewski, David Pinsof, and guest Cari Goetz discuss how romantic relationships are subject to cultural norms, religion, legal constraints, and idealistic 'love propaganda' that make breakups uniquely difficult compared to other partnerships. They explore the evolutionary perspective on relationship duration and the mismatch between modern legal/social expectations and human psychology.
↗ 36:03 – 40:23The speakers examine mating as a zero-sum game and discuss why infidelity and mate value must often remain opaque. They analyze how common knowledge of partner transgressions can damage status and force individuals to signal unwanted tolerance, making plausible deniability and strategic ignorance adaptive strategies in relationships.
↗ 40:24 – 48:05Dave Pietraszewski, David Pinsof, and guest Cari Goetz discuss the functional perspective of regret, noting how it serves as an initial mechanism to evaluate decisions and potentially transform into emotions like shame or guilt. They examine buyer's regret as an automatic generation of counterfactual thinking triggered by high-cost commitments.
↗ 1:00:09 – 1:03:07The speakers explore how modern evolutionary mismatches create endless counterfactual options regarding mates and housing. They analyze whether mate value and gender differences influence regret, and consider how reputational concerns and strategic signaling can shape reported regret in casual sexual contexts.
↗ 1:03:07 – 1:12:12Host David Pinsof and guest Cari Goetz discuss the adaptive challenges of ending romantic relationships, exploring mate disengagement behaviors such as slowly ramping down investment or making oneself less desirable. They examine how abrupt breakups impose high social and emotional costs, potentially triggering anger and reputation damage, whereas gradual disengagement can mitigate these negative impacts.
↗ 1:12:13 – 1:19:51The speakers examine how emotions intersect with mating research, noting that traditional evolutionary psychology focused heavily on jealousy while neglecting a broader, nuanced study of affective experiences. They argue that developing rigorous research programs around emotions in mating contexts is essential for understanding human experience and addressing psychological needs.
↗ 1:32:39 – 1:36:18Host Dave Pietraszewski, David Pinsof, and guest Cari Goetz discuss how emotions apply across romantic relationships and how mating psychology connects with broader cooperative and friendship literature. They examine irreplaceability, high-stakes cooperative dynamics, and whether mating should be viewed as a separate domain or part of a broader continuum.
↗ 1:36:18 – 1:43:00Hosts Dave Pietraszewski and David Pinsoff introduce the podcast episode and guest Hugo Mercier, a researcher at the Institut Jean Nicod in France associated with the Paris School of Cultural Evolution. They discuss his books, 'The Enigma of Reason' and 'Not Born Yesterday,' highlighting topics such as reasoning, epistemic vigilance, and why humans hold specific beliefs without being overly gullible.
↗ 0:00 – 2:59Hugo Mercier explains the argumentative theory of reasoning, arguing that the evolutionary function of human reason is not solitary logical calculation, but rather communicating with others by exchanging arguments and justifications. Mercier and the hosts discuss how this framework accounts for well-documented phenomena like confirmation bias or myside bias, drawing parallels to evolutionary functions like reproduction where individuals lack conscious awareness of ultimate biological purposes.
↗ 3:00 – 12:04Dave Pietraszewski, David Pinsof, and Hugo Mercier discuss confirmation bias, also known as my-side bias, and how the argumentative theory of reasoning explains why people readily produce supporting arguments for their existing views while struggling to see opposing perspectives.
↗ 12:05 – 13:50Dave Pietraszewski, David Pinsof, and guest Hugo Mercier discuss how social blame, such as witchcraft accusations in small-scale societies, helps individuals avoid costly helping obligations while deflecting personal responsibility. They explore whether human inability to detect our own biases functions as a design feature to prevent undermining the persuasiveness of our arguments, and touch upon confirmation bias and depression.
↗ 24:06 – 31:12Hugo Mercier outlines the two main functions of reasoning: exchanging arguments to change minds and justifying oneself. The speakers discuss how political, cultural, and conversational opinions often serve reputation-building and coordination of justifications rather than pure truth-seeking, with individuals anticipating social disagreement and tailoring explanations to fit their audience.
↗ 31:12 – 36:08Dave Pietraszewski, David Pinsof, and Hugo Mercier discuss the disconnect between underlying behavioral drivers and verbal confabulations. They examine how people utilize vague, unfalsifiable, or socially convenient justifications to support their actions, and how these narratives persist when they lack rigorous critical pushback from outsiders.
↗ 36:08 – 45:53Dave Pietraszewski, David Pinsof, and guest Hugo Mercier discuss the evolutionary and cognitive nature of reasoning, distinguishing general inference from a specialized mechanism dedicated to finding and evaluating reasons through social feedback and structured learning.
↗ 48:09 – 56:12David Pinsof pushes back with a solitary counterexample involving chess strategy, leading Hugo Mercier to clarify that individual strategic planning relies on different cognitive mechanisms than social reasoning, which specifically requires exchanging reasons with others.
↗ 56:13 – 1:00:13Host David Pinsof asks guest Hugo Mercier how his work on epistemic vigilance and people not being gullible reconciles with confabulation and the acceptance of questionable beliefs. Mercier explains that humans possess cognitive mechanisms to evaluate communicated information because incentives do not always align. People remain critical when they disagree, but relax their criteria and accept justifications more easily when they already agree with the conclusion.
↗ 1:00:14 – 1:07:32Host David Pinsof highlights the distinction between intuitive beliefs—which directly guide behavior and are connected to the nervous system—and reflective beliefs, which are functionally inert and serve social functions. Mercier illustrates this difference by contrasting individuals who witness real conspiracies with conspiracy theorists, noting that true witnesses experience genuine fear and caution, whereas theorists display muted emotional reactions while remaining unusually vocal.
↗ 1:07:33 – 1:12:16Hugo Mercier and David Pinsof discuss how reflective beliefs can function as social signals rather than genuine intuitive convictions. Pinsof suggests that common inferences drawn from actions create social incentives for signaling, comparing certain beliefs to pseudoscience. Mercier responds that while signaling explains widespread cultural spread, initial beliefs still must meet a minimum threshold of plausibility and epistemic vigilance.
↗ 1:12:16 – 1:19:44The speakers examine how beliefs become widespread initially, discussing the role of group polarization, outgroup hostility, and intentional manipulation through advertising and propaganda. Mercier explains that persuasive messages and advertisements ultimately succeed by tapping into pre-existing human desires and evolutionary preferences, such as the natural appeal of sugar.
↗ 1:19:45 – 1:24:21Dave Pietraszewski, David Pinsof, and guest Hugo Mercier discuss the effectiveness of health messages, advertising, and consumer choices regarding food items like vegetables, sugar, and ice cream. They debate whether dietary choices stem from intrinsic preferences or structural market influences, highlighting the role of product availability and choice architecture.
↗ 1:24:21 – 1:30:36Host Dave Pietraszewski and guest Sarah Mathew discuss anthropological fieldwork among the Turkana people, examining how they consume meat from animals dying of disease without getting sick. They explore whether this resilience stems from cultural knowledge or physiological adaptations, highlighting pastoralist practices and the importance of social learning in human survival across harsh environments.
↗ 12:04 – 21:14Sarah Mathew, Dave Pietraszewski, and David Pinsof discuss evolved psychological predispositions for social learning, contrasting older models with modern perspectives from artificial intelligence and cognitive science on how mental structures and modularity develop with minimal genetic priors.
↗ 24:07 – 34:09Guest Sarah Mathew discusses with hosts Dave Pietraszewski and David Pinsof her transition from studying ants to human evolutionary biology. Inspired by cultural evolution frameworks, she highlights how human cooperation stands out in the animal kingdom, noting its immense scale, flexibility, and intensity at both large and small scales compared to other social species.
↗ 36:12 – 41:30Sarah Mathew illustrates small-scale human cooperation using field observations from Turkana, where individuals maintain distant friendships and mutual investments. The speakers explore the paradox of humans achieving massive cooperative feats while remaining largely self-interested, contrasting human egalitarian norms with insect eusociality and hierarchical animal systems.
↗ 41:30 – 48:13Host Dave Pietraszewski, David Pinsof, and guest Sarah Mathew discuss human cooperation, contrasting it with other species through human reliance on culture and imitation. Mathew explains group structured cultural selection, detailing a genetic and cultural study of pastoral groups in Northwest Kenya, which revealed low genetic variation between groups but significantly higher cultural variation.
↗ 48:14 – 54:13Dave Pietraszewski, David Pinsof, and Sarah Mathew discuss how social norms serve as coordination solutions that manage common knowledge and allow humans to achieve high levels of cooperation despite being fundamentally self-interested. They examine cultural group selection, ecological resource extraction, and how normative packages spread through competition.
↗ 1:00:19 – 1:08:01The hosts and guest explore whether human tribalism and intergroup animosity should be viewed as cultural adaptations rather than purely genetic ones. They discuss how cultural practices that extract resources and defend groups proliferate, while noting that gene-culture coevolution remains an empirical question.
↗ 1:08:01 – 1:12:22Dave Pietraszewski, David Pinsof, and Sarah Mathew discuss how cultural norms interact with evolved human psychology during intergroup conflicts. They explore whether humans are predisposed to learn specific tribal norms, how cultural packages leverage partner-choice psychology to demonize outgroups, and empirical findings on ethnic essentialism among the Turkana and Toposa groups.
↗ 1:12:22 – 1:22:13The speakers transition to discussing a study on post-traumatic stress disorder among Turkana warriors conducted with Matt Zefferman. Sarah Mathew shares her initial ethnographic observations, noting that warriors did not spontaneously report symptoms like intrusive thoughts, prompting an evolutionary behavioral science inquiry into trauma, physical danger, and norm psychology.
↗ 1:22:13 – 1:24:27Sarah Mathew discusses how PTSD symptoms split into universal physical danger responses, such as hypervigilance and startle seen cross-culturally in groups like the Turkana, and depressive symptoms linked to motivational changes. The speakers explore how navigating complex social norms and moral violations during war shapes these motivational and psychological outcomes.
↗ 1:24:27 – 1:32:18Sarah Mathew and the hosts examine differences in depressive symptom severity between US soldiers and Turkana warriors, connecting them to moral violations and social sanctions. They conclude that the elaborate cultural norms and rituals surrounding warfare highlight the crucial role of cultural adaptation alongside evolved human psychology.
↗ 1:32:18 – 1:36:34Dave Pietraszewski, David Pinsof, and Sarah Mathew discuss how norms govern warfare and how genetically evolved psychological mechanisms make humans vigilant about norm violations. They examine the various moral events and violations experienced by the Turkana, such as abandoning injured comrades, failing to share resources, or facing blame from families when a companion dies on a raid, and how these relate to depressive symptoms.
↗ 1:36:34 – 1:43:31The hosts and Sarah Mathew explore whether individuals anticipate social disapproval or rely on community reactions as a moral compass. Mathew shares surprising findings regarding combat killing among the Turkana: despite strong cultural institutions and permanent bodily scar markers rewarding warriors, individuals who killed in combat reported higher depressive symptom severity and experiences of feeling haunted.
↗ 1:43:31 – 1:48:37The speakers discuss the psychological challenges and moral violations of killing in warfare, examining how cultural mechanisms and institutions help groups overcome a natural aversion to violence. They contrast different cultural approaches to conflict, such as those of the Turkana versus modern nation-states, and consider how changing institutional rules and incentives might reduce war and intergroup hostility.
↗ 1:48:37 – 1:57:04As the episode concludes, the hosts thank guest Sarah Mathew for her invaluable empirical and theoretical fieldwork with the Turkana. They reflect on broader paradigm shifts regarding human nature, discussing how social norms, fairness, and egalitarianism operate as sophisticated mechanisms for coordinating self-interest and maintaining cooperative groups.
↗ 1:57:05 – 2:00:39Dan Nettle discusses his research philosophy, explaining how he attempts to combine evolutionary psychology with macro-level social science questions. He argues that traditional evolutionary psychology often focuses on simple problems while ignoring complex social, cultural, and economic structures, and he highlights his work on topics like income inequality and crime.
↗ 4:23 – 12:03Dave Pietraszewski, David Pinsof, and guest Dan Nettle discuss how individual psychological mechanisms feed into macroscopic social patterns. They examine whether the concept of "reverse engineering" applies appropriately to human minds versus large-scale social institutions, contrasting design logic with emergent path-dependent processes like inflation and legal systems.
↗ 12:03 – 22:11David Pinsof asks Dan Nettle about cultural group selection approaches and whether institutions like monogamy, religion, and subsistence tools can be understood through a design stance. Nettle responds that while cultural processes certainly yield functional outcomes or maladaptive traps, the underlying mechanism is driven by purposive agents seeking alternatives rather than classic genetic natural selection.
↗ 22:11 – 24:03Dave Pietraszewski, David Pinsof, and Dan Nettle discuss the relationship between cultural institutions and individual human agency. They examine how societal rules can cause people to opt out or rebel, how power asymmetries and conflicting Darwinian interests shape human behavior, and why evolutionary psychology provides robust tools for understanding conflict.
↗ 24:03 – 30:14The speakers explore a modern shift in evolutionary social sciences regarding surface-level political propaganda versus underlying power and resource motivations. They discuss why political rhetoric frames self-interested agendas as high-minded ideals, and how partner choice ecologies and reputational pressures give abstract ideas genuine causal force.
↗ 30:14 – 36:05In this excerpt from "Evolutionary Social Sciences with Dan Nettle," the host Dave Pietraszewski and guest Dan Nettle discuss how strategic self-interest, fear of being labeled a hypocrite, and risk aversion drive adherence to social norms. They argue that the internalization of social systems is often overstated, and cultural practices persist because individuals prefer predictable status quos over risky alternatives.
↗ 36:06 – 43:00Host Dave Pietraszewski, host David Pinsof, and guest Dan Nettle discuss how human decision-making is shaped by the structure of both the individual agent and their environment. They distinguish their evolutionary and ecological perspective from popular classical 'nudge' interventions and cheat codes, emphasizing that human behavior often makes strategic sense when evaluated within its specific ecological context.
↗ 48:11 – 52:32Dan Nettle, Dave Pietraszewski, and David Pinsof explore why conventional education-based interventions for teen pregnancy often fail because they misinterpret adaptive reproductive choices as mere ignorance. They discuss how evolutionary models align with qualitative social science in recognizing that individuals make rational strategic decisions tailored to their ecological conditions, avoiding unwarranted moralization.
↗ 52:32 – 1:00:13Host Dave Pietraszewski and guest Dan Nettle discuss shifting away from folk psychology to view humans as organisms with evolved capacities solving problems, comparing this perspective to economic models of strategic agents operating under constraints.
↗ 1:00:13 – 1:03:41Host David Pinsof and guest Dan Nettle examine the popular evolutionary mismatch explanation for obesity, critiquing the traditional narrative about sweet foods and stop signals while discussing how food processing and environmental unpredictability influence fat storage.
↗ 1:03:41 – 1:12:13Dave Pietraszewski, David Pinsof, and guest Dan Nettle discuss the limitations of over-relying on mismatch explanations in evolutionary psychology. They explore how human adaptability, emotional responses to horror, and complex behavioral inputs like the demographic transition demonstrate that early models of reproductive maximization and mating were excessively oversimplified.
↗ 1:12:13 – 1:18:24Dave Pietraszewski, David Pinsof, and guest Dan Nettle discuss how evolutionary psychology is moving past simple folk psychology and populist intuitions toward more nuanced, complex models of the mind. They examine parallels with anthropology's non-judgmental approach and critique the coherence of the so-called standard social science model as a rhetorical foil.
↗ 1:24:17 – 1:30:16David Pinsof and Dan Nettle explore whether an evolutionary approach to power and inequality is subversive to the status quo, and how scientific insights feed into broader public policy debates. Nettle explains his perspective on universal basic income, arguing that psychological insufficiency and unpredictability drive negative social externalities.
↗ 1:30:16 – 1:36:17Dan Nettle and the hosts discuss the psychological and economic dimensions of resource distribution systems, comparing approaches like universal basic income with targeted welfare. They also examine how public investments in community infrastructure, such as playgrounds and healthcare, help prevent downstream societal costs despite initial political and cognitive hurdles.
↗ 1:36:17 – 1:41:41Hosts Dave Pietraszewski and David Pinsof introduce the podcast and guest Léo Fitouchi from the Institute for Advanced Study in Toulouse. They discuss the interdisciplinary nature of the institute, bringing together anthropologists, psychologists, and economists within an evolutionary framework.
↗ 0:01 – 5:03Léo Fitouchi contrasts his view on the cognitive logic of moral judgment with self-interest models, explaining with David Pinsof that moral rules emerge from principles of mutual benefit and collective action. They explore how moral cognition helps societies detect mutually beneficial social contracts and manage free rider problems in conditional cooperation.
↗ 15:55 – 24:07Host David Pinsof, Dave Pietraszewski, and guest Léo Fitouchi discuss the game-theoretic foundations of morality, distinguishing simple coordination problems from prisoner's dilemma public goods games. They examine how self-control acts as a signal of cooperative potential, suggesting that resisting short-term temptations and delaying gratification signals trustworthiness and willingness to contribute to collective goods.
↗ 24:07 – 28:20The hosts and Léo Fitouchi explore the large cross-cultural variation in moralizing bodily pleasures and self-control. They discuss why certain societies are more puritanical than others, debating whether economic development, baseline impulsivity, or contextual threats shape the stringency of these moral norms across different populations.
↗ 28:20 – 36:10Host Dave Pietraszewski and guest Léo Fitouchi discuss whether moralizing self-control stems from false psychological beliefs or broader cultural selection processes. Fitouchi explains that while some addictive behaviors impair self-control, people often hold false assumptions about how private indulgences correlate with cheating and general cooperation.
↗ 36:10 – 44:12David Pinsof suggests that puritanical norms might act as self-fulfilling costly signals of reputation and commitment. While acknowledging the costly signaling perspective, Léo Fitouchi notes it does not fully explain why puritanical cultures are so specifically obsessed with bodily pleasure.
↗ 44:12 – 48:11Dave Pietraszewski, David Pinsof, and guest Léo Fitouchi discuss self-conscious emotions, shame, and guilt. They examine how shame tracks reputational value and social exclusion, whereas guilt functions separately as a moral emotion tied to cooperation and repairing breaches in fairness or prisoner's dilemma situations.
↗ 48:11 – 53:48The hosts and Léo Fitouchi explore the evolutionary puzzle of punishment. While standard evolutionary theory suggests deterrence as the primary function of punishment, human moral psychology strongly emphasizes proportionality and just desserts, presenting a conflict between consequentialist and retributive accounts.
↗ 53:48 – 1:00:13Léo Fitouchi discusses how moral psychology views cheating as creating a moral debt, where punishment functions analogously to material compensation. Rather than purely forward-looking deterrence, retributive punishment acts as a form of benefit extraction through cost infliction, bounded by the distributive computations of what offenders owe their victims.
↗ 1:00:13 – 1:08:56The speakers examine historical and structural differences between tort law and criminal law, arguing that criminal trials lacking victim compensation may foster greater punitiveness, while also exploring how group identity and shared vulnerability influence perceived just deserts.
↗ 1:16:10 – 1:24:16The speakers examine a hypothesis about elite art consumption as a costly signal of self-control and competence. Guest Léo Fitouchi and the hosts discuss whether preferences for highbrow culture signal trustworthiness or competence, and how socioeconomic class, future discounting, and perceptions of status intersect.
↗ 1:27:16 – 1:36:18The hosts and Léo Fitouchi debate whether human moral psychology is fundamentally net positive or negative, comparing moral intuitions to intuitive physics and discussing the evolutionary origins of moral disagreements.
↗ 1:41:07 – 1:48:18Hosts David Pinsoff and David Pietraszewski introduce the topic of free will, discussing why it generates intense debate and how an adaptationist perspective approaches philosophical and psychological inquiries into human nature.
↗ 0:00 – 9:53David Pietraszewski and David Pinsof discuss whether the human concept of free will is rooted in our evolved cognitive phenotype. They examine adaptationist perspectives, the psychological underpinnings of free will, and the concept of evolutionary mismatch.
↗ 12:02 – 19:27Dave Pietraszewski and David Pinsof discuss the adaptive significance of distinguishing between outcomes we can control through internal planning and motivational systems and those we cannot, comparing waking up early to healing a broken bone.
↗ 36:11 – 40:52David Pietraszewski and David Pinsof discuss the first-person perspective of free will, focusing on counterfactual reasoning, whether self-reflection can change one's behavior, and why philosophical definitions center on reasons responsiveness.
↗ 48:15 – 52:18David Pietraszewski and David Pinsof examine how individuals might suppress free will signals to demonstrate allyship or romantic commitment, and how the fear of manipulation and being predictable relates to debates surrounding free will and evolutionary psychology.
↗ 52:19 – 1:00:16David Pietraszewski and David Pinsof discuss why evolutionary psychology and the mechanics of human behavior cause discomfort and fear of determinism. They propose an empirical project categorizing people into individual differences regarding free will based on when manipulation invalidates free will, identifying three distinct stops along the free will train.
↗ 1:00:16 – 1:05:55The speakers examine how extreme pressures, such as holding a gun to someone's head or facing survival threats, affect perceived free will and bypass means-end reasoning. They discuss how value judgments and error management perspectives drive people to ascribe more free will to morally bad outcomes.
↗ 1:05:55 – 1:12:19David Pietraszewski and David Pinsof discuss how predictability and determinism relate to the philosophical debate on free will. They propose that concerns about determinism and quantum indeterminacy stem from evolved psychological mechanisms designed to prevent manipulation and exploitation by others, rather than abstract physics.
↗ 1:12:19 – 1:16:46David Pietraszewski uses a biological analogy of a fish with an oxygen detector to explain evolutionary mismatch in the context of free will. The speakers argue that free will is a coherent psychological representation, comparing debates over its existence to asking whether a fish with artificially supplied oxygen is truly suffocating.
↗ 1:16:46 – 1:24:20David Pietraszewski and David Pinsof discuss how debates surrounding free will and determinism stem from different levels of analysis and varying conceptions of the self. They explore compatibilism versus incompatibilism, comparing how individuals define the conscious self versus unconscious evolutionary and genetic forces.
↗ 1:24:20 – 1:30:21David Pietraszewski and David Pinsof draw parallels between the historical debate on cognitive modularity in psychology and current disagreements over free will, suggesting that misunderstandings arise from mismatched definitions of mechanisms, the self, and what constitutes external manipulation.
↗ 1:30:22 – 1:36:21David Pietraszewski and David Pinsof discuss how to empirically test theories of free will, examining individual differences in how people view the self, intentional intervention, and the distinction between being a victim of determinism versus enjoying new capabilities and power.
↗ 1:36:21 – 1:46:40David Pietraszewski and David Pinsof discuss how applying an adaptationist framework to philosophical debates about free will can contextualize and clarify conflicting intuitions. Rather than declaring positions entirely right or wrong, the speakers suggest that adaptationism acts as a meta-theory explaining why various philosophical arguments arise, potentially transforming philosophy by treating its intuitions as evolved psychological readouts.
↗ 1:48:27 – 1:57:45The hosts briefly explore applying adaptationist analysis to other complex philosophical concepts, such as consciousness, before reflecting on the challenges of communicating expansive theoretical work. David Pietraszewski and David Pinsof conclude by discussing the difficulty of summarizing exhaustive evolutionary research into brief elevator pitches and expressing appreciation for working through these ideas aloud.
↗ 1:57:45 – 2:00:31Luke Glowacki describes his journey from studying philosophy to discovering evolutionary behavioral sciences through a critic's book. The conversation then transitions to his recent paper, 'The Evolution of Peace,' exploring how culture bridges the gap between evolutionary biology and psychological processes in intergroup conflict and cooperation.
↗ 5:43 – 12:00Dave Pietraszewski, David Pinsof, and guest Luke Glowacki discuss how human tolerance of strangers and peaceful interaction with unknown individuals differ from other social primates like chimpanzees and bonobos. They explore the evolutionary and comparative biology perspectives, examining whether peace and intergroup conflict rely on cultural technologies and ancestral behavioral states.
↗ 12:01 – 17:20The hosts and Luke Glowacki examine whether other species engage in lethal intergroup violence without power imbalances, discussing examples like bandit mongooses. They analyze how expected costs and benefits drive coalitionary violence, contrasting chimpanzee attacks with mongoose scrum dynamics and Richard Wrangham's imbalance of power hypothesis.
↗ 17:20 – 24:04Dave Pietraszewski, David Pinsof, and guest Luke Glowacki discuss the ecological and social conditions that give rise to lethal intergroup violence across species. They explore fission-fusion social structures, resource distribution, and why certain animals like chimpanzees engage in coalitionary aggression while others do not.
↗ 24:04 – 30:07The hosts and Luke Glowacki examine whether carnivory is a necessary precondition for coalitionary violence and the evolution of war. They discuss how group-living psychology, resource defense, and territoriality interact to determine which species develop cooperative aggression.
↗ 30:07 – 36:04Hosts Dave Pietraszewski and David Pinsof discuss the evolution of coalitionary violence with guest Luke Glowacki, examining why multi-agent conflict is zoologically rare, the computational and strategic challenges of forming stable coalitions, and how new data requires a refinement of existing theoretical models across species.
↗ 36:04 – 42:57Guest Luke Glowacki shares fieldwork observations among the Nyangatom in East Africa, leading to the insight that because war can easily offer tangible benefits like resources and status, the harder theoretical question is understanding how groups successfully stop fighting and establish peace.
↗ 42:57 – 48:09Host Dave Pietraszewski and guest Luke Glowacki discuss the nature of intergroup conflict in small-scale societies, noting that decentralized conflict typically takes the form of low-risk raids rather than large-scale warfare. They examine the costs and benefits of these raids, comparing human patterns to those of other species like chimpanzees, and discuss how modern technologies like firearms and cell phones influence these traditional behaviors.
↗ 48:09 – 58:46Dave Pietraszewski, David Pinsof, and guest Luke Glowacki discuss the evolutionary and cultural challenges of maintaining peace between groups, focusing on how small-scale societies struggle with individual rogue actors reinitiating cycles of violence and the difficulty of enforcing group-level norms without centralized institutions.
↗ 1:00:11 – 1:07:34The speakers examine why people often attribute collective blame to out-groups and how modern societies differ from decentralized tribal groups in their ability to coordinate, dehomogenize groups, and extend moral boundaries beyond immediate kin and in-group members.
↗ 1:07:34 – 1:12:12David Pinsof and Luke Glowacki debate whether moralization, dehumanization, and narratives play a necessary causal role in intergroup violence or if they are merely epiphenomenal. Pinsof argues that moral justifications and narrative framing are necessary to manage reputational costs and coordinate collective action among humans, whereas Glowacki highlights ethnographic examples of bounded moral universes where violence occurs without elaborate pretexts.
↗ 1:14:57 – 1:24:13Dave Pietraszewski, David Pinsof, and guest Luke Glowacki discuss how evolved psychology handles ingroup cooperation and outgroup hostility, contrasting small-scale societies with modern social environments where promiscuous moral inferences about character are more common due to large networks and abundant social options.
↗ 1:24:13 – 1:30:39Guest Luke Glowacki discusses with hosts Dave Pietraszewski and David Pinsof how peace acts as a cultural technology invented to solve coordination problems. They explore evolutionary psychology, the enforcement of peace through executing rule-breakers, power imbalances, and the ethnography of patron-client relationships among small-scale societies.
↗ 1:36:15 – 1:44:07Guest Luke Glowacki chats with hosts Dave Pietraszewski and David Pinsof about his current book manuscript on war and peace. Glowacki explains how his perspective has evolved from a behavioral ecological approach to examining cultural mechanisms of warfare, including the cultural significance of the working title "Enemy Eaters" among tribal societies.
↗ 1:48:18 – 1:50:36Hosts Dave Pietraszewski and David Pinsof introduce their podcast and guest Michael Graziano, discussing how consciousness is often viewed as a nebulous or "floofy" concept. They explore why approaching consciousness through a clear, mechanistic, and evolutionary framework helps ground difficult intuitive concepts rather than treating them as impenetrable mysteries.
↗ 0:00 – 8:16Guest Michael Graziano and the hosts discuss how the rapid advancement of technology and large language models provokes a philosophical reaction. People cling to the idea of consciousness as a special, non-physical essence to separate biological minds from machines, creating widespread misconceptions in both public and scholarly discourse.
↗ 12:01 – 14:55David Pinsof, Dave Pietraszewski, and Michael Graziano explore how psychology has historically overlooked perspective dependence, treating intuitive outputs like consciousness and free will as literal truths rather than brain-constructed models. Using the analogy of white light, they discuss how biological visual systems construct useful, cartoonish simplifications that persist despite academic knowledge of underlying physics.
↗ 14:55 – 24:01Dave Pietraszewski, David Pinsof, and Michael Graziano discuss how color vision functions not to accurately represent objective reality, but to help organisms differentiate objects and adaptively interact with their environment. They then explore how self-models in the brain are similarly simplified because tracking every single physical neuron would be adaptively useless and computationally inefficient.
↗ 24:01 – 28:42Michael Graziano uses the phantom limb phenomenon to illustrate how the brain's automated self-models can create powerful intuitive feelings that misrepresent physical reality. The speakers discuss why treating these internal model outputs as literal scientific truths leads researchers astray when studying consciousness and dualism.
↗ 28:42 – 36:06Dave Pietraszewski, David Pinsof, and guest Michael Graziano discuss the subpersonal, software-level functional descriptions of the brain, exploring how self-models represent internal states such as decision-making and attention. They examine how simplified models of mental processes give rise to intuitive concepts like free will and conscious awareness.
↗ 36:06 – 46:16The hosts and Michael Graziano discuss why the brain needs an internal model of its own attentional state, comparing it to models of external objects and other people's minds. They explore how predicting and tracking one's own attention serves practical, adaptive purposes in daily behavior regulation.
↗ 46:16 – 48:08Host Dave Pietraszewski and guest Michael Graziano discuss how predictive models of attention help humans control their behavior, avoid distractions, and anticipate social interactions. Graziano explains that having a rich predictive model of attention functions similarly to motor control systems, allowing organisms to monitor states, correct errors, and simulate future actions effectively.
↗ 48:08 – 53:25Dave Pietraszewski, David Pinsof, and guest Michael Graziano discuss artificial intelligence and consciousness. Graziano explains that consciousness in AI would be a mundane self-model tracking attention rather than a sci-fi awakening. They also explore evolutionary perspectives on why people fear AI consciousness.
↗ 1:00:09 – 1:07:24The speakers examine how consciousness is intertwined with ethics, animal welfare, and moral treatment. Graziano notes that evolutionary theory is ethically blind, and discusses which animals—such as vertebrates, mammals, and birds—likely possess sophisticated attention control systems and consciousness.
↗ 1:07:25 – 1:12:10Host Dave Pietraszewski and guest Michael Graziano discuss whether artificial intelligence can possess emotions and consciousness, exploring the complex biological and neurological layers of human emotional processing, the distinction between unconscious emotional states and conscious feelings, and how severe events engage self-monitoring systems.
↗ 1:12:11 – 1:22:04Dave Pietraszewski, David Pinsof, and Michael Graziano discuss how human interaction with artificial intelligence and companion bots subtly rewires social machinery, agency detection, and social contagion. Rather than worrying about AI consciousness itself, the speakers consider how automatically ascribing consciousness to AI contaminates human representations of agents and social interaction patterns.
↗ 1:24:15 – 1:28:26David Pinsof and Michael Graziano explore how human hypersociality and the constant need to model other minds lead people to overperceive consciousness in the environment, grounding religious intuition, the concept of God, and conspiratorial thinking about social dynamics in evolutionary adaptations.
↗ 1:28:26 – 1:36:20Dave Pietraszewski, David Pinsof, and guest Michael Graziano discuss why intuitive folk psychological models of consciousness clash with physicalist science. They examine how brain networks dedicated to empathy and mechanical task processing are antithetical, why scientific explanations of consciousness trigger fears of manipulation, and why theories explaining this cognitive mismatch often feel unsatisfying.
↗ 1:36:20 – 1:43:22David Pinsof, Dave Pietraszewski, and guest Michael Graziano discuss how evolutionary psychology and reverse-engineering perspectives can help model attention and subjective states in organisms. They examine adaptive functions such as predator detection, compare vertebrate and invertebrate systems, and contrast these with theories like integrated information theory.
↗ 1:48:21 – 1:53:51Hosts Dave Pietraszewski and David Pinsof introduce the podcast episode featuring guest Paul Smaldino, discussing his work on mathematical models, institutional selection criteria, bad science, and the nuances of covert signaling and punk rock.
↗ 0:01 – 3:33Paul Smaldino discusses the functional role of identity from an evolutionary and cultural perspective, explaining how human identity acts as a social category used for adaptive decision-making, cooperation, and strategic interaction.
↗ 3:34 – 12:03Host Dave Pietraszewski prompts guest Paul Smaldino to discuss his methodological approach to studying social identity and other topics. Smaldino explains that the vast majority of his work relies on mathematical and computational modeling rather than just traditional experiments or fieldwork. He describes how building simplified artificial systems helps researchers tackle complex dynamics, uncover unexpected consequences, and run numerous variations efficiently.
↗ 12:04 – 19:48Paul Smaldino discusses the anthropological and sociological history of identity markers, explaining how individuals signal their identity through fashion, language, and behavior to navigate group affiliations. Host Dave Pietraszewski and David Pinsof join in with a lighthearted comparison between human urban commuting and chimpanzee social behavior.
↗ 24:10 – 27:36Paul Smaldino elaborates on covert signaling and pragmatics, explaining how humans use ambiguous language, humor, and subtext to signal their identities selectively in diverse societies without risking backlash. He then describes how researchers translate these verbal theories into formal mathematical models to test predictions.
↗ 27:37 – 36:11Paul Smaldino discusses with Dave Pietraszewski and David Pinsof how mathematical models and artificial populations are constructed to study overt and covert signaling between similar and dissimilar individuals. Smaldino explains the trade-offs in communication fidelity, how assumptions can be tested or extended, and the benefits of agent-based modeling for investigating complex social interactions.
↗ 36:12 – 41:40The speakers explore theoretical extensions regarding overt messaging as a costly signal of political loyalty that burns bridges with moderates. Smaldino connects these insights back to his modeling and the noticeable surge in extreme political movements around 2015 and 2016.
↗ 57:34 – 1:00:17Host Dave Pietraszewski, David Pinsof, and guest Paul Smaldino discuss how the internet and political shifts embolden individuals to move from covert to overt signaling. They explore perceptions of group formidability, why minority or low-status dissidents take high-risk actions when they have nothing to lose, and examples like punk rockers in East Germany and outlaw groups.
↗ 1:00:17 – 1:09:17The hosts transition to discussing Paul Smaldino's work on meta-science, specifically the natural selection of bad science with Richard McElreath. They highlight how social systems and selection pressures often produce unintended consequences that diverge entirely from individual intentions, emphasizing the necessity of formal modeling over naive individual-level analyses.
↗ 1:09:18 – 1:12:17Paul Smaldino explains why scientists sometimes engage in poor methodology, describing an agent-based evolutionary model that simulates how publication quantity and professional prestige create selection pressures that can disfavor careful, rigorous science.
↗ 1:17:45 – 1:24:19Paul Smaldino discusses with the hosts how scientific fields fail to naturally select for better methods and truth over time, drawing parallels to life history theory trade-offs between quality and quantity. They examine how career incentives in academia reward fast, catchy publications over rigorous, slow science, leading to systemic outcomes driven by institutional incentives rather than individual intentions.
↗ 1:24:19 – 1:30:03The speakers explore why appealing to individual conscience and morality fails to fix systemic issues in science, politics, and media. Smaldino and the hosts argue that institutional incentive structures naturally select against people susceptible to moral appeals, meaning lasting change requires altering the actual selection mechanisms rather than just scolding bad actors.
↗ 1:30:03 – 1:36:21Dave Pietraszewski, David Pinsof, and guest Paul Smaldino discuss how incentive structures shape behavior and institutional norms, applying these ideas to the replication crisis in psychology and the social sciences. They examine how status games, professional stakeholders, and shifting methodological standards influence scientific progress.
↗ 1:36:21 – 1:40:54Paul Smaldino and David Pinsof discuss the role of theory and risk-taking in scientific research. They explore the balance between pursuing counterintuitive hypotheses and building on established knowledge, viewing science through the lens of collective problem-solving, variation, and evolutionary dynamics.
↗ 1:40:54 – 1:48:25Dave Pietraszewski, David Pinsof, and guest Paul Smaldino discuss how academic publishing norms and journal requirements often select against good, purely theoretical work by demanding immediate empirical data, which can inadvertently promote superficial theories.
↗ 1:48:26 – 1:51:08Hosts Dave Pietraszewski and David Pinsof introduce guest expert Josh Tybur, discussing his expertise in disgust and disease psychology. Tybur shares his personal and academic journey moving from the US to Amsterdam during the financial crisis, reflecting on differences between American and European universities and experiencing pandemic lockdowns in an urban setting.
↗ 0:00 – 7:23Josh Tybur discusses his empirical research tracking psychological variables related to pathogen avoidance, disgust sensitivity, and outgroup attitudes during the COVID-19 pandemic in the Netherlands, providing insights into how human behavior and contact comfort changed when infectious disease threats became highly salient.
↗ 7:23 – 12:02Dave Pietraszewski, David Pinsof, and guest Josh Tybur discuss a multi-year longitudinal study tracking behavioral immune system responses during the COVID-19 pandemic. Tybur explains that despite widespread reflective disease worries, measures of disgust sensitivity, anti-immigrant bias, and contact comfort remained stable over time due to high individual-level consistency.
↗ 12:02 – 16:02Dave Pietraszewski, David Pinsof, and guest Josh Tybur examine the evolutionary logic of the behavioral immune system, highlighting pioneering work by Mark Schaller and others. They discuss how ancient parasite pressures shaped human psychology across domains like eating and social interaction, and how local ecological adaptations may inform prejudice toward outgroups.
↗ 16:02 – 24:02Josh Tybur and Dave Pietraszewski discuss skepticism surrounding the hypothesis that the mind evolved to treat out-group membership as a cue to pathogens. Tybur highlights counterevidence from social psychology, including minimal group paradigms and coalition detection, suggesting that intergroup biases track assumptions of interdependence rather than ecological origins.
↗ 24:02 – 26:50The speakers examine how people detect real infection cues versus relying on general relationship valuation. They discuss experimental findings showing that individuals use visual and acoustic signals of immune activation and calibrate pathogen avoidance tendencies based on how much they value specific social partners.
↗ 26:51 – 36:02Host Dave Pietraszewski and guest Josh Tybur discuss how the behavioral immune system interacts with social valuation and intergroup attitudes. Tybur explains that tolerance for infection risk depends heavily on interpersonal value and traits like honesty rather than outgroup status alone. They also examine how immigrant assimilation affects disgust responses and anti-immigrant attitudes.
↗ 36:02 – 41:03In this section, the speakers discuss how pathogen avoidance mechanisms and disgust sensitivity are modulated in the context of parenting and mating. Josh Tybur and the hosts explore research on parental tolerance for infant waste, the methodological complexities of priming studies in sexual contexts, and whether the behavioral immune system operates with targeted precision rather than blunt generalization.
↗ 48:04 – 52:52The speakers examine how sophisticated adaptations within the behavioral immune system account for social rituals, physical affection, and cross-cultural sexual practices. David Pinsof and Josh Tybur discuss costly signaling theories, exploring why behaviors involving pathogen exposure or physical risk—such as contact rituals and BDSM—may function as hard-to-fake signals of social affiliation and sexual arousal.
↗ 52:52 – 1:00:09Host David Pinsof and guest Josh Tybur discuss how people perceive research on disgust and pathogen avoidance. They examine whether the field faces resistance, comparing it to ideological pushback in other areas of evolutionary psychology, and discuss whether apparent disgust toward physical abnormalities or obesity is better explained by social value or infection cues.
↗ 1:00:10 – 1:09:39The speakers explore the cultural phenomenon of zombies through the lens of evolutionary psychology, discussing them as supernormal stimuli representing severe pathogen risk and zoonotic infection, while contrasting fictional representations of mobile infected individuals with real-world infectious diseases.
↗ 1:09:40 – 1:12:14Host Dave Pietraszewski, David Pinsof, and guest Josh Tybur discuss how evolutionary biology explains disease vectors and the virulence-spreadability trade-off. They examine how pathogens balance incapacitating their hosts with the need to spread through vectors like mosquitoes or fleas, referencing historical perspectives from Paul Ewald's work on infectious disease.
↗ 1:12:14 – 1:14:38Guest Josh Tybur shares his critical perspective on the concept of evolutionary mismatch in evolutionary psychology. He argues that mismatch is often overextended, poorly tested, and conflates behavioral ecology with evolutionary psychology, while discussing examples like junk food preferences, ancestral ecologies, and error management theory.
↗ 1:14:38 – 1:24:15The hosts and guest discuss the concept of evolutionary mismatch, examining whether it serves as a useful analytical tool for evolutionary psychologists or functions merely as an intuitive, lazy narrative shortcut. They also touch upon early pathogen and disgust research, considering how initial broad models have evolved toward greater specificity.
↗ 1:24:16 – 1:32:58The speakers evaluate whether pathogen sensitivity relates to phenomena like conformity, noting that findings have been shaky. They then pivot to discuss the relationship between disgust and moral judgment, exploring Jonathan Haidt's work on moral foundations, emotional intuitions, and moral dumbfounding through classic vignettes.
↗ 1:32:58 – 1:36:20Guest Josh Tybur discusses historical research on disgust and moral priming, addressing subsequent criticisms and a meta-analysis questioning the effect. With hosts Dave Pietraszewski and David Pinsof, Tybur explores empirical distinctions between disgust and anger in moral violations, highlighting how victim identity, perpetrator value, and behavioral motivations shape distinct emotional responses and aggression tendencies.
↗ 1:36:20 – 1:45:17Josh Tybur and the hosts discuss how feelings of disgust influence the moralization of behaviors such as incest and homosexuality. They explore theories on how cultural evolution, individual costs, and social coordination shape cross-cultural taboos, noting how attitudes toward homosexuality have shifted dramatically over time compared to other moral rules.
↗ 1:48:20 – 1:56:42Dave Pietraszewski, David Pinsoff, and Josh Tybur discuss how moral condemnation and disgust can function as strategic tools for acquiring status without necessarily excluding others. They explore religious framing, political signaling, and how coalition-building and social contagion parallel physical pathogen avoidance.
↗ 2:00:22 – 2:09:49The speakers examine the similarities and differences between physical pathogen disgust and moral disgust. Josh Tybur and David Pinsoff consider how gossip and behavioral motivations function to manage reputation and protect individuals from unwanted inferences of alliance with norm violators.
↗ 2:09:50 – 2:12:25Dave Pietraszewski and Josh Tybur discuss the shared phenomenology between pathogen disgust and moral disgust, drawing an analogy to the representation of opportunity costs in mental versus physical effort. They explore whether commonalities reflect contagion or valuation.
↗ 2:12:25 – 2:15:28In the concluding segment, host Dave Pietraszewski and guest Josh Tybur briefly experience a connection glitch before summarizing the conversation about high-level commonalities in organism affordances, wrapping up the interview as it grows late for Josh.
↗ 2:15:29 – 2:16:35Hosts Dave Pietraszewski and David Pinsof introduce guest Clark Barrett, a prominent anthropologist and evolutionary psychologist from UCLA. They discuss his influential work bridging evolutionary psychology, cultural evolution, and behavioral ecology, before transitioning into Barrett's early life ambitions, his undergraduate studies in biology at Harvard, and his early fascination with marine biology and fish behavior.
↗ 0:00 – 5:57Clark Barrett discusses how his early background in functional morphology and fish biology informed his later transition to studying humans. He describes stumbling into the epicenter of evolutionary psychology at UCSB by finding John Tooby and Lita Cosmides in the phone book, and how they guided him from broad questions of consciousness toward tractable dissertation research on predator-prey dynamics and agency.
↗ 5:58 – 12:00Host Dave Pietraszewski and guest Clark Barrett discuss human social cognition, investigating why people attribute free will and choice to others. Barrett explains that evolutionary approaches examine the adaptive functions of moral cognition and culpability rather than solely relying on introspective or armchair philosophical methods.
↗ 12:00 – 16:35The speakers explore whether moral cognition and mind-reading are universal or shaped by culture. Barrett argues that cross-cultural data reveal significant similarities in folk models of the mind, while acknowledging that different cultures emphasize distinct aspects of cognition, such as rational deduction versus embodied knowledge.
↗ 16:35 – 24:02Dave Pietraszewski, David Pinsof, and guest Clark Barrett discuss the tension between excessive hyper-rationalism and embodied, intuitive connections to the physical world. They touch upon historical shifts in science, Konrad Lorenz's critiques of mechanistic animal models, changing perspectives on animal and plant cognition, and the historical avoidance of anthropomorphism in behavioral science.
↗ 36:03 – 43:44Host Dave Pietraszewski, host David Pinsof, and guest Clark Barrett discuss parallels between ancestral hunting technologies, statistical rituals in scientific research, and human reliance on opaque procedures. Barrett highlights how both indigenous practices and null hypothesis significance testing involve trust in efficacy conditions without full comprehension, leading to potential overconfidence and oversight.
↗ 48:07 – 54:31Host Dave Pietraszewski, host David Pinsof, and guest Clark Barrett discuss cognitive processes during dreaming and altered states of consciousness, comparing them to AI noise injection and Bayesian learning. They explore how non-conscious churning and psychological technologies can help individuals break out of overly rigid cognitive priors and discover creative insights.
↗ 1:00:12 – 1:09:13Host Dave Pietraszewski and guest Clark Barrett transition to discussing the indigenous music scene in South America, traditional and modern hybrid musical forms, and the broader evolutionary puzzles surrounding music, emotional responses, and mathematical aesthetics.
↗ 1:18:43 – 1:24:16Dave Pietraszewski, David Pinsof, and Clark Barrett discuss how high-level scientific expertise resembles art and intuition rather than explicit rules. The speakers reflect on the apprenticeship-like culture within evolutionary psychology centers, noting how practitioners absorb unconscious conceptual frameworks over time.
↗ 1:24:16 – 1:26:22Clark Barrett, Dave Pietraszewski, and David Pinsof examine the need for greater demographic and conceptual diversity within evolutionary science. They discuss generative concepts like mismatch, critique the heavy reliance on Western philosophical traditions in moral psychology, and consider how engagement with diverse cultures can broaden scientific understanding.
↗ 1:26:22 – 1:36:22The speakers explore why cultural variation in moral systems appears to downplay mental states, connecting it to Julian Lapenie's modeling work on low-trust environments and ethnographic concepts of mental opacity. They also consider how local social ecologies, such as repeated interactions with unhelpful partners, shape whether people care about intentions versus direct consequences.
↗ 1:54:54 – 2:00:25Dave Pietraszewski, David Pinsof, and guest Clark Barrett discuss scientific humility and reflexivity in evolutionary behavioral sciences. Barrett argues that genuine hypothesis testing is rare, adaptationism standards are often too low, and researchers frequently rely on thin evidence such as correlations or broad universal patterns without sufficiently ruling out alternative explanations.
↗ 2:00:25 – 2:08:31As the episode winds down, the hosts thank Clark Barrett for fostering a kinder and more welcoming scientific culture. Barrett reflects on how many perceived conflicts between evolutionary science and other fields like cultural anthropology are unnecessary, advocating for an inclusive community that embraces human diversity and curiosity.
↗ 2:08:31 – 2:12:30Dave Pietraszewski, David Pinsof, and guest Clark Barrett discuss expanding the tent of evolutionary psychology through an absorbing mindset rather than a conquering one. They emphasize steel manning alternative theories, translating non-evolutionary ideas into an evolutionary framework for greater rigor, and moving past historical combativeness.
↗ 2:12:30 – 2:15:51Hosts Dave Pietraszewski and David Pinsof introduce the podcast, discuss the growing cultural and scientific interest in the microbiome, and introduce guest Katrine Whiteson from UC Irvine, who studies the microbiome from an evolutionary perspective.
↗ 0:00 – 4:47Katrine Whiteson discusses her collaboration with John Patton, detailing salivary science research and the significance of chicha, a traditional fermented beverage in Ecuador, contrasting indigenous diets with modern processed foods and their impact on human microbiomes.
↗ 4:52 – 12:03Host Dave Pietraszewski and guest Katrine Whiteson discuss how modern food processing and the loss of dietary fiber have dramatically shifted human microbiomes, correlating with rises in autoimmune diseases, allergies, and certain cancers. They explore historical human populations, such as in Canombo, who lack these conditions, and mention international efforts like the Global Microbiome Conservancy to preserve historical microbes.
↗ 12:04 – 15:20Katrine Whiteson discusses a household-level microbiome study in Conombo comparing saliva, chicha, and fecal samples. The researchers found high diversity and an abundance of the fiber-degrading microbe Prevatella, which is largely missing in industrialized populations. Whiteson hypothesizes that these ancient microbes may have been passed down through human generations since leaving Africa.
↗ 36:11 – 40:35The speakers examine the physiological effects of processed foods, with Katrine Whiteson explaining that removing fiber from food starves beneficial gut microbes. This causes microbes to consume the protective gut mucus lining, potentially leading to weakened barrier function and health issues.
↗ 1:06:01 – 1:12:17Dave Pietraszewski, David Pinsof, and Katrine Whiteson discuss consumer food preferences, the hidden societal costs of highly processed, low-fiber diets, and how temporal discounting influences eating habits. They also compare laxatives like Miralax and Metamucil, highlighting how fiber intake supports a healthy microbiome and influences infection and health outcomes.
↗ 1:12:17 – 1:20:22The hosts transition into a casual discussion about films like Oppenheimer, historical recordings, and their immense admiration for Charles Darwin. They discuss what it would be like to share modern scientific discoveries with Darwin and briefly touch upon popular evolutionary psychology books like The Moral Animal.
↗ 1:52:17 – 1:56:03Hosts Dave Pietraszewski and David Pinsof introduce guest Patrick Durkee to discuss evolutionary approaches to personality and status. They examine traditional psychological assumptions, define status in academic literature as attention, deference, and resource control, and explore how these components relate to resource holding potential and social dynamics.
↗ 0:00 – 7:02David Pinsof proposes a definition of status centered on common knowledge of a person's relative value as a social partner and its downstream consequences for coalitions and alliances. Patrick Durkee responds positively, noting alignments with his work with Aaron Lukaszewski and biological literature on coalitional support and resource holding potential.
↗ 7:03 – 12:00Dave Pietraszewski, David Pinsof, and guest Patrick Durkee discuss how individuals acquire status by generating benefits or costs for others. They explore the nuances of willingness versus ability to confer benefits, as well as the externalities of actions where helpful outcomes occur independently of intentional goodwill.
↗ 12:00 – 16:55Patrick Durkee, David Pinsof, and Dave Pietraszewski discuss how emotion programs track status, skill domain, and potential for improvement to help individuals find role models. They examine how the mind distinguishes between respect, admiration, and envy, and explore why underdog stories like Rudy resonate with audiences by highlighting surprising means of achieving success.
↗ 24:01 – 29:54The speakers explore why people are vulnerable to self-help messaging and advertising about status despite the unlikelihood of universal success. They discuss whether the human mind relies on error-management strategies and predictive modeling rather than precise causal identification when navigating the complex social world.
↗ 29:55 – 36:03Host Dave Pietraszewski, guest Patrick Durkee, and host David Pinsof discuss whether predictive models or causal mechanisms drive status and learning. Using examples like ice cream sales predicting shark attacks and children learning to fish, they explore how organisms rely on predictive cues and confounds when true causal interventions are too costly or complex.
↗ 36:03 – 43:38Dave Pietraszewski, David Pinsof, and guest Patrick Durkee discuss how status hierarchies operate beyond superficial folk conceptions, focusing on avoidance of conflict and ostracism rather than mere superiority. They explore the volatility of status symbols, cultural changes in what is valued, and why certain status games eventually collapse when perceived as ridiculous.
↗ 48:05 – 55:55The speakers examine the psychology of inspiration as a hierarchical navigation emotion. David Pinsof and Patrick Durkee discuss how people evaluate the long-term stability of status games by looking at historical persistence across generations, using cultural examples like ancestral exploration to illustrate how stories signal enduring and rewarding pursuits.
↗ 55:55 – 1:00:08Patrick Durkee, Dave Pietraszewski, and David Pinsof discuss how cultural aesthetics intertwine with status games, how different groups negotiate status with specific audiences, and how individuals calculate coalitional alliances and power dynamics within human groups.
↗ 1:00:08 – 1:07:33The speakers examine the challenge of forecasting future status landscapes, incorporating morality and coordination focal points into long-term status game strategies, high school social dynamics, and moral discourse.
↗ 1:07:33 – 1:12:09Patrick Durkee discusses how individual differences in psychological mechanisms that estimate status impacts serve as personality generators. He explains an exploratory study measuring participants' accuracy in assessing how various actions affect status, finding that individuals with better rank-ordering accuracy tend to have higher status motivations.
↗ 1:12:09 – 1:19:54Patrick Durkee discusses with David Pinsof and Dave Pietraszewski how empirical work can model individual psychological mechanisms, such as parameters in the shame system and situation detectors for devaluation, linking them to traditional lexical personality concepts like the Big Five and HEXACO.
↗ 1:24:10 – 1:26:29The hosts and Patrick Durkee explore whether stable personality differences arise from strategic commitments, switch costs, and individual variations in psychological components, using a cybernetic thermostat analogy to explain ambient detectors, set points, and control elements.
↗ 1:26:30 – 1:35:06Patrick Durkee defines social niches based on the work of colleagues, describing them as distinct segments of the social world where individuals make their living, akin to ecological niches occupied by different species.
↗ 1:35:08 – 1:36:13Host Dave Pietraszewski and guest Patrick Durkee discuss how environmental niches shape human behavior and personality traits. Drawing on simulations and comparisons to ecological diversity, Durkee explains that low-dimensional personality models like the Big Five may not reflect innate biological human nature, but rather emergent patterns of trait covariation driven by responses to local incentives.
↗ 1:36:13 – 1:45:50David Pinsof, Dave Pietraszewski, and Patrick Durkee examine behavioral genetics, noting that a large portion of personality variation stems from genetic proclivities and non-shared environmental randomness rather than shared familial environment. They use a computer hardware metaphor to explore why certain observable differences might emerge stably without directly mapping onto the fundamental computational design of the human mind.
↗ 1:45:50 – 1:48:14The speakers explore the conceptual purpose of personality from an evolutionary and functional perspective, comparing it to free will. Patrick Durkee suggests that personality functions as a mental marker for behavioral tendencies that are less easily changed, acting more like fixed constants in the equation of human interaction.
↗ 1:55:05 – 2:00:15Dave Pietraszewski, David Pinsof, and guest Patrick Durkee discuss how folk psychology conceptualizes personality traits, emotions, and motivations as behavioral prediction tools. They examine whether traits are causal mechanisms or descriptive summaries, highlighting how an evolutionary adaptationist approach helps explain the cognitive structures underlying personality labels and interpersonal conflict.
↗ 2:00:15 – 2:10:20Guest Patrick Durkee outlines his current and upcoming research projects, focusing on linking emotional parameters and situation-detecting algorithms to broader personality traits, as well as distinguishing between status prediction and causal intervention. Hosts Dave and David then conclude the episode with lighthearted outro remarks.
↗ 2:16:15 – 2:19:04Hosts Dave Pietraszewski and David Pinsof introduce guest Amy Boddy from UC Santa Barbara. They discuss the fascinating biological concepts of microchimerism, cancer biology across species, maternal-offspring dynamics, and how individuals are not entirely uniform entities.
↗ 0:00 – 4:23Amy Boddy explains how cells cross between mother and baby during pregnancy, known as microchimerism. The hosts and guest explore the placenta as a fetal organ and the evolutionary conflict between maternal and paternal genes over resource allocation.
↗ 4:23 – 12:02Host Dave Pietraszewski and guest Amy Boddy discuss the evolutionary conflicts between maternal and paternal genes during pregnancy. They explore genomic imprinting, placental mammals, and the trade-offs of maternal investment, noting that paternal genes tend to extract more resources while maternal bodies face higher survival costs.
↗ 12:02 – 16:59Amy Boddy explains how fetal and maternal cells transfer across the placenta during pregnancy and persist for decades. The speakers discuss microchimerism, where foreign cells or genetic material remain within an individual, potentially serving adaptive functions or representing historical family transmissions such as cells from older siblings.
↗ 17:00 – 24:02Host David Pinsof and guest Amy Boddy discuss why the immune system tolerates fetal microchimerism cells from pregnancy, despite similarities to organ transplant rejection. They explore whether paternal genes in these cells trigger autoimmune diseases in women, noting that while autoimmune conditions are complex, specific maternal-paternal genetic matches can indeed provoke such immune reactions.
↗ 24:02 – 26:15The speakers transition to discussing the evolution of cancer, contrasting external pathogens like bacteria with internal cancer cells that violate multicellular cooperation. Amy Boddy explains that cancer arises when somatic cells lose cooperative behaviors and revert to selfish proliferation, influenced by aging, tissue fitness, immune system dynamics, and trade-offs linked to placental gestation.
↗ 26:16 – 36:03Host Dave Pietraszewski and guest Amy Boddy discuss the potential physiological effects of microchimerism, examining whether persistent fetal or maternal cells provide health benefits such as tissue repair or increased longevity, and how technological advances have changed scientific perspectives on cell transfer across generations.
↗ 36:03 – 44:26David Pinsof, Dave Pietraszewski, and Amy Boddy discuss comparative biology across mammals and marsupials, exploring theories about placental invasiveness, cancer rates, and unusual phenomena such as transmissible cancers found in Tasmanian devils and bivalves.
↗ 44:28 – 48:04Host Dave Pietraszewski and guest Amy Boddy discuss contagious cancers like Tasmanian devil facial tumor disease, examining how genetic bottlenecks and reduced immune recognition allow these cells to persist in other hosts, while introducing evolutionary medicine and why humans are vulnerable to diseases.
↗ 48:04 – 53:24Amy Boddy and the hosts explore how ecological principles and evolutionary theory can improve cancer and antibiotic treatments, comparing drug resistance management to managing ecosystems and discussing how shifting treatment metaphors from total conquest to disease control changes medical practice.
↗ 53:24 – 1:00:04Dave Pietraszewski, David Pinsof, and guest Amy Boddy discuss the challenges of integrating evolutionary medicine into traditional medical training and practice. They explore how funding agencies like the NIH often sideline basic evolutionary biology as too risky, whereas natural selection has provided robust roadmaps for addressing human diseases like cancer through comparative biology.
↗ 1:00:05 – 1:07:43The hosts and guest discuss the slow uptake of evolutionary perspectives in the social sciences, psychiatry, and general education within the United States compared to countries like the UK. They examine how cultural divides, educational gaps, and the occasional misuse of evolutionary concepts hinder mainstream scientific acceptance.
↗ 1:07:44 – 1:12:07Hosts Dave Pietraszewski and David Pinsof discuss how evolutionary science faces unique scrutiny and misinformation compared to other scientific fields. Guest Amy Boddy then shares her academic journey from community college and medical school interests to evolutionary biology and anthropology, reflecting on interdisciplinary silos and her current work as a biological anthropologist.
↗ 1:12:07 – 1:21:39Amy Boddy explains the concept of evolutionary mismatch by comparing cancer and pregnancy patterns in humans versus chimpanzees, noting consequences of modern practices like C-sections. The speakers highlight how an evolutionary perspective emphasizes trade-offs, such as balancing the health benefits of breastfeeding for infants against the physiological costs to mothers, before introducing Peto's paradox.
↗ 1:21:41 – 1:24:08Host Dave Pietraszewski and guest Amy Boddy discuss cancer evolution, focusing on Peto's Paradox—the observation that large, multi-cellular animals like elephants have much lower cancer rates than expected given their high cell counts. Boddy explains how evolutionary theory led researchers to discover that elephants possess multiple copies of the tumor suppressor gene P53.
↗ 1:24:09 – 1:29:37The speakers explore alternative cancer defenses across diverse species, such as whales and the remarkably long-lived Greenland shark, linking longevity to life history strategies. Finally, Boddy recommends academic resources and university centers for students interested in the interdisciplinary field of evolutionary medicine.
↗ 1:29:38 – 1:36:09Host Dave Pietraszewski, David Pinsof, and guest Amy Boddy discuss recommended books in evolutionary medicine, the historical separation between evolutionary medicine and psychology, intuitive psychology or "folk medicine," and how modern scientific and medical practices share similarities with ritualistic behaviors.
↗ 1:36:09 – 1:43:09Dave Pietraszewski, David Pinsof, and guest Amy Boddy discuss the challenges of securing research funding for high-risk evolutionary medicine and comparative biology projects. The hosts express appreciation for Boddy's cancer research and highlight the value of bridging evolutionary psychology with physiological and biological studies.
↗ 1:48:12 – 1:51:35The hosts Dave Pietraszewski and David Pinsof introduce the podcast episode featuring guest co-host Christina Moya and guest Rob Boyd. They discuss the history of evolutionary psychology, the pioneering work of Rob Boyd and Pete Richardson on cultural evolution, and how these ideas fit within the broader Darwinian framework while celebrating scientific debate and respectful disagreement among researchers.
↗ 0:00 – 4:12Rob Boyd joins the conversation to discuss how he and Pete Richardson began studying cultural evolution in the mid-1970s. They explore the landscape of evolutionary theory at the time, including sociobiology, game theory, the influence of figures like Richard Alexander and E.O. Wilson, and how population genetics methods provided tools to model cultural transmission alongside biological selection.
↗ 4:16 – 12:01Dave Pietraszewski, David Pinsof, and Rob Boyd discuss how cultural information transmits differently than genetic traits, exploring developmental biology, phenotypic evolution, and the historical differences between UC Davis selectionist biology and other frameworks.
↗ 12:01 – 18:47The speakers examine how rapid evolutionary changes occur across species like anoles and guppies by acting on standing genetic variation rather than waiting for new mutations, prompting broader reflections on evolutionary pacing and human behavioral sciences.
↗ 18:47 – 24:06Rob Boyd and Dave Pietraszewski discuss evolutionary biology, the heritability of menopause, and debates surrounding human cognitive adaptations and fossil species classification. Boyd reflects on views of the human brain, comparing species-typical traits with variation across populations and referencing paleontological discoveries.
↗ 24:06 – 30:05Rob Boyd and David Pinsof discuss whether the brain contains specialized modules, contrasting evolutionary psychological approaches with neurobiological perspectives and instinctive animal behaviors like beaver dam building and bird nest construction.
↗ 30:06 – 36:07Dave Pietraszewski, David Pinsof, and guest Rob Boyd discuss the virtues of intellectual honesty in science and share personal memories of interacting with evolutionary biologist John Maynard Smith at conferences and lectures.
↗ 36:07 – 39:20The hosts and Rob Boyd examine the core theoretical disagreements regarding cultural evolution, contrasting the view that humans possess a psychology shaped to acquire cultural practices without full adaptive understanding against traditional adaptationist models.
↗ 39:20 – 48:11Dave Pietraszewski, David Pinsof, and guest Rob Boyd discuss the evolutionary explanations for extreme cultural behaviors like celibacy and group sacrifice, contrasting modular psychological accounts with cultural evolution and group-level selection of norms.
↗ 48:12 – 52:21The speakers debate the integration of evolutionary psychology with cultural evolution, examining how complex technological artifacts like kayaks, bicycles, and kinship structures develop over time through trial and error versus innate cognitive modules.
↗ 52:21 – 1:00:12Dave Pietraszewski, David Pinsof, and guest Rob Boyd discuss the relationship between evolved psychological adaptations and cultural evolution, examining whether sophisticated cognitive mechanisms complement cultural processes and how to disentangle genetic versus cultural explanations for universal behaviors like reading and marriage.
↗ 1:00:12 – 1:05:55The speakers discuss quantitative questions about human predispositions, credulity regarding social cues, and whether motivations or the cost-benefit calculations around conformity and social norms are shaped by cultural environments or innate propensities.
↗ 1:05:56 – 1:12:15Host Dave Pietraszewski and guest Rob Boyd discuss the evolutionary origins of morality and norms, debating whether moral outrage and rule-following stem from long-term evolutionary selection, social costs, or internalized cultural learning. Drawing on fieldwork in Fiji, they examine how deeply held moral beliefs and local norms shape human behavior and emotional responses across different timescales.
↗ 1:12:15 – 1:19:09The speakers—Dave Pietraszewski, David Pinsof, and Rob Boyd—examine multiple timescales operating in cultural evolution, distinguishing between genetically evolved intuitions, childhood norm internalization, and in-the-moment incentives. They conclude that many debates in behavioral science persist due to a lack of precise natural language distinctions and vocabulary.
↗ 1:19:09 – 1:24:18Guest Rob Boyd joins hosts Dave Pietraszewski and David Pinsof to discuss the adaptationist paradigm, contrasting rigid constraints with developmental pathways that shape biological variation. Rob Boyd references Lensky's long-term E. coli experiments to illustrate how rare neutral mutations and improbable events can overcome apparent limitations in evolutionary trajectories.
↗ 1:24:18 – 1:34:18The speakers examine whether rapid environmental changes and non-equilibrium conditions undermine adaptationist models. Rob Boyd explains that variation operates across multiple timescales, noting that organisms may respond to temporal averages or stationary distributions rather than reaching a static equilibrium.
↗ 1:34:18 – 1:36:18Rob Boyd discusses with the hosts how the timescale and amplitude of environmental fluctuations during the Pleistocene prevented the emergence of agriculture and large-scale cooperation among non-relatives, contrasting those conditions with the stable Holocene period.
↗ 1:36:19 – 1:39:50Rob Boyd and the hosts explore methodological approaches in cultural evolution, comparing analytical models with agent-based computer simulations, discussing issues of code reliability, replication challenges, and the tendency for mathematical and simulation work to become decoupled from empirical behavioral observations.
↗ 1:39:50 – 1:48:24Dave Pietraszewski, David Pinsof, and guest Rob Boyd discuss the strengths and limitations of analytical models compared to agent-based simulations in evolutionary theory. They explore how mathematical equations provide deep conceptual intuitions, whereas simulations can sometimes obscure the underlying mechanisms unless researchers perform rigorous experimentation.
↗ 1:48:25 – 1:55:50Host Dave Pietraszewski and guest Rob Boyd discuss the integration of theory and empirical work in the evolutionary sciences and psychology. Boyd reflects on how his views have evolved over the decades, expressing increased skepticism about cultural group selection and conformist transmission based on recent empirical findings and theoretical limitations.
↗ 2:00:25 – 2:08:36The hosts and Rob Boyd discuss the narrowing gap between cultural evolution and evolutionary psychology. After concluding the scientific discussion, the hosts wrap up the episode with informal banter regarding podcast merchandise, Patreon support, and minimalist t-shirt designs.
↗ 2:08:37 – 2:11:09Hosts Dave Pietraszewski and David Pinsof introduce guest Jen Byrd-Craven to discuss the endocrine system, stress, and evolutionary psychology. The speakers examine why humans possess an endocrine system alongside a brain, comparing computational and embodiment perspectives on motivation.
↗ 0:00 – 8:02The speakers discuss the evolutionary functions of childhood, puberty, and extended human life history stages. They explore how childhood serves as a feeding adaptation and a protected period for learning complex social environments, culminating in distinct human life history traits like menopause.
↗ 8:03 – 12:02Dave Pietraszewski, David Pinsof, and guest Jen Byrd-Craven discuss the evolutionary history of human social selection, extractive foraging niches, and how energy allocation across the lifespan is regulated by endocrine mechanisms.
↗ 12:02 – 19:00Host Dave Pietraszewski and guest Jen Byrd-Craven discuss the adaptationist perspective on stress, noting discrepancies between self-reported stress and physiological measures. Byrd-Craven explains that stress is fundamentally about mobilizing energy when demands exceed resources, noting that even positive experiences like romantic love or anticipating holidays can elicit physiological stress responses.
↗ 24:02 – 32:14Dave Pietraszewski, David Pinsof, and guest Jen Byrd-Craven discuss how stress functions as a costly and honest signal of fitness interdependence and allyship. They also explore developmental aspects of stress, arguing that avoiding all stressors or bubble-wrapping children can stunt their ability to cope with normal challenges and lead to hyper-reactive stress response systems.
↗ 36:05 – 43:25The hosts and Jen Byrd-Craven examine how the body learns to self-regulate and allocate the appropriate level of energy during recurring challenges, noting that cortisol helps restructure neural networks. They also discuss whether modern stress responses to purely cognitive challenges, such as a math test, represent an evolutionary mismatch where the body overshoots energy expenditure.
↗ 43:26 – 48:06Host Dave Pietraszewski and guest Jen Byrd-Craven discuss whether the human stress response is poorly designed, arguing instead that activating multiple systems in novel situations is a functional error-management strategy. They examine how modern social media and attention markets exploit these evolved mechanisms through sensationalized content and outrage.
↗ 48:06 – 56:12Hosts Dave Pietraszewski and David Pinsof discuss with guest Jen Byrd-Craven how attention and mental effort are allocated during stressful situations. They explore the hypothesis that restructuring neural networks and encoding detailed information during critical events is energetically demanding, and touch upon how individuals recover after periods of high stress.
↗ 1:00:06 – 1:04:51Guest Jen Byrd-Craven and the hosts examine how childhood environments and social unpredictability calibrate human stress response systems and future orientation. They discuss how individuals from chaotic or high-adversity backgrounds adapt their vigilance and diurnal stress patterns to match their specific ecological contexts.
↗ 1:04:51 – 1:12:09Host Dave Pietraszewski and guest Jen Byrd-Craven discuss the relationship between stress, future discounting, and metabolic calibration. They explore how early childhood environments and resource unpredictability shape developmental outcomes such as obesity and metabolism, noting that abstract social cues and stress can exert profound physiological effects on the developing body.
↗ 1:12:09 – 1:14:50Guest Jen Byrd-Craven joins hosts Dave Pietraszewski and David Pinsof to discuss how parents navigate stress and risk-taking in children. The conversation shifts to ongoing research on human fatherhood, rough-and-tumble play, and hormonal shifts like testosterone decreases associated with parental investment and heightened empathy.
↗ 1:14:50 – 1:24:10Dave Pietraszewski, David Pinsof, and guest Jen Byrd-Craven discuss evolutionary perspectives on parental investment, arguing that parents invest in children's social status and competencies because offspring face an intergenerational arms race. They also touch upon political indoctrination, cultural transmission, and religious adherence among youth.
↗ 1:24:10 – 1:27:29The speakers examine why human emotions are so deeply connected to musical vibrations and acoustic stimuli. Greg Bryant suggests that our sensitivity to music builds upon foundational adaptations for vocal emotion communication, which cultural evolution has further amplified into a powerful super-stimulus.
↗ 21:12 – 24:02Dave Pietraszewski, David Pinsof, and guest Greg Bryant discuss why auditory signals like screams or distorted music evoke stronger emotional responses than linguistic emotion labels. They explore how nonlinearities, such as broadband noise and pitch, act as evolutionary cues reflecting physiological arousal across species.
↗ 24:03 – 31:09The speakers examine vocal effort, how humans infer physiological states from sound despite distance, and whether musical instruments are constrained to frequencies matching human vocal ranges.
↗ 31:09 – 36:06Host Dave Pietraszewski, David Pinsof, and guest Greg Bryant discuss whether vocal pitch and loudness correlate with physical strength and body size in humans. They examine the mechanics of vocal fold size, testosterone, and how physical training influences vocal loudness and pitch production.
↗ 36:06 – 40:16Greg Bryant explains formant dispersion as the average distance between resonating frequencies determined by vocal tract length. The speakers explore how formants relate to body size perception, instrument analogies, and how acoustic properties in vocalizations and music can evoke complex emotional or reflective states.
↗ 40:16 – 48:06Dave Pietraszewski, David Pinsof, and guest Greg Bryant discuss how emotions like sadness and happiness are communicated through vocal affect induction. They examine how musical properties such as tonality, major and minor keys, and melodic contours derive from human vocal expressions, while also considering the relationship between speech frequencies and chromatic scales.
↗ 48:07 – 58:13The hosts and Greg Bryant explore whether music is a biological or cultural adaptation, contrasting the social bonding hypothesis with the perspective that music functions as credible signaling. Bryant describes collaborative academic target articles debating these competing evolutionary theories.
↗ 58:14 – 1:00:11Dave Pietraszewski, David Pinsof, and guest Greg Bryant discuss the evolutionary origins of music, examining hypotheses around honest coalition signaling and infant-caregiver emotional communication. They explore human rhythmic entrainment capacities, comparing human motor coordination with vocal learning and beat-keeping abilities in animals such as sea lions and cockatoos.
↗ 1:00:11 – 1:07:23Host Dave Pietraszewski and guest Greg Bryant discuss Bryant's transition from music and speech prosody research into the study of verbal irony and laughter. Bryant explains how laughter functions as an evolutionarily conserved play vocalization, highlighting the interaction between the vocal emotion system and the volitional speech system across mammals and humans.
↗ 1:12:13 – 1:19:44Guest Greg Bryant discusses his recent work in bioacoustics involving gibbons, dogs, and foxes to understand animal play vocalizations and their connection to human laughter. Then, Bryant and host David Pinsof explore theories of laughter as a signal of decryption or coalition strength, and how contagious laughter helps diffuse social costs and create common knowledge.
↗ 1:19:44 – 1:24:17In this excerpt from "Music and Acoustics with Greg Bryant," host David Pinsof discusses his preprint theory of laughter as a mechanism for diffusing communication mix-ups with guest Greg Bryant and host Dave Pietraszewski. They explore the evolutionary arms race between volitional signals and detectors, comparing laughter's acoustic properties to animal play vocalizations and examining how social cohesion and shared cultural background influence humor.
↗ 1:24:17 – 1:30:37Greg Bryant discusses the evolutionary history of human vocalizations and animal play signals with Dave Pietraszewski and David Pinsof, focusing on whether laughter is homologous across mammals like primates and rats.
↗ 1:48:23 – 1:51:53Hosts Dave Pietraszewski and David Pinsof introduce guest Martin Daly, one of the founders of evolutionary behavioral sciences. Daly discusses the foundational history of the field, emphasizing its strongly interdisciplinary nature involving anthropologists and biologists rather than just psychology, and shares his transition into Darwinian animal behavior research.
↗ 0:00 – 6:48Martin Daly recalls how he and Margot Wilson began researching human behavior after running a sociobiology seminar following Ed Wilson's book. He details key early academic centers at Harvard and Michigan, influential figures like Dick Alexander, and foundational meetings that led to the Human Behavior and Evolution Society.
↗ 6:50 – 12:04Martin Daly discusses the early reception of applying evolutionary theory to Homo sapiens, noting strong support from theoretical biologists like Bill Hamilton and George Williams. Daly reflects on his background in behavioral endocrinology, the interdisciplinary nature of the field bridging animal behavior and human studies, and how evolutionary thinking gradually gained acceptance within psychological journals despite occasional resistance.
↗ 12:04 – 20:34Martin Daly discusses historical professional challenges faced by early anthropologists interested in evolutionary approaches, highlighting friction over terminology between human behavioral ecologists and evolutionary psychologists, and reflecting on his background outside mainstream psychology.
↗ 24:05 – 28:57Host Dave Pietraszewski and guest Martin Daly discuss the early days of evolutionary psychology, their resistance to terms like "innateness" and "instinct," and historical critiques rooted in animal behavior background. They explore how these terms can dismiss developmental ontogeny and generate confusion, while also touching on Steven Pinker's work on the language instinct.
↗ 36:07 – 43:55Martin Daly shares empirical examples from animal behavior studies, such as desert rodents processing specialized salt bush leaves, to illustrate the complexities of developmental contingency and evolved behaviors. The conversation then transitions to methodological skepticism regarding self-report data in behavioral research.
↗ 43:55 – 48:07Martin Daly explains how he and Margot began studying homicide to bypass reporting biases associated with child maltreatment and to gain an objective window into human conflict and passions, eventually partnering with police departments such as in Detroit.
↗ 52:43 – 1:00:17Martin Daly discusses his research on homicide rates linked to inequitable access to resources and the challenges of studying inequality. The speakers explore the role of deductive logic in evolutionary psychology, debate the physiological and psychological mechanisms by which inequality gets under the skin, and address criticisms regarding mediation and causal pathways.
↗ 1:00:18 – 1:06:32The speakers discuss how socioeconomic inequality relates to patterns of violence, noting that violence often occurs among the have-nots rather than targeting the wealthy. Martin Daly and the hosts explore whether inequality at the top versus the bottom drives resentment and risky behavior, connecting these dynamics to risk-sensitive foraging theory and having stakes in life.
↗ 1:12:19 – 1:21:04Asked about the overall story of evolutionary psychology, Martin Daly reflects on his disappointments regarding infighting among potential allies, as well as his broader feelings on the reception of evolutionary approaches, including encounters with international scholars and researchers during events like Darwin Day in Iran.
↗ 1:21:05 – 1:24:19Host Dave Pietraszewski, David Pinsof, and guest Martin Daly discuss the cancellation of a Darwin Day event in Iran, religious attitudes toward evolutionary theory, and the current state of evolutionary biology, anthropology, and psychology in academia.
↗ 1:24:19 – 1:29:17The speakers discuss whether foundational figures in evolutionary psychology like George Williams and Lita Cosmides were driven by righteous anger against flawed prevailing views, and consider how younger generations navigate academic pressures and institutional corporatization.
↗ 1:29:18 – 1:36:23Dave Pietraszewski, David Pinsof, and Martin Daly discuss the state of academic research, focusing on funding models in Canada, the shift toward large concentrated grants, and how these changes impact scientific creativity and risk-taking among younger scholars.
↗ 1:36:23 – 1:44:10The speakers reminisce about early discussions concerning what to name the emerging field of evolutionary psychology, touching on debates between 'Darwinian psychology' and 'evolutionary psychology,' before briefly discussing Don Simons' intellectual background in animal behavior and anthropology.
↗ 1:44:10 – 1:48:24Dave Pietraszewski, David Pinsof, and guest Martin Daly discuss the legacy of Don Simons, his emphasis on explicit psychological framing, and the early days of the Human Behavior and Evolution Society supported by prominent evolutionary biologists.
↗ 1:48:24 – 1:53:31Martin Daly advises young researchers to gain a deep comparative perspective by studying non-human animals to avoid anthropocentric biases in evolutionary psychology, followed by closing remarks and music discussion by the hosts.
↗ 1:53:32 – 1:59:55Hosts David Pinsoff and Dave Pietraszewski introduce the podcast and their guest, Leda Cosmides, reflecting on the history of evolutionary psychology and the journey of producing the podcast over nearly a year.
↗ 0:00 – 2:27Leda Cosmides discusses her early motivations during the turbulent 1960s to understand human nature, her dissatisfaction with behaviorism and psychobiology, and how ethology and an eventual meeting with E.O. Wilson shaped her scientific path.
↗ 2:30 – 12:03Guest Leda Cosmides recounts her early introduction to E.O. Wilson's sociobiology as an undergraduate, her advice from Wilson and Robert Trivers, and her participation in the Simeon Seminar. Leda Cosmides, Dave Pietraszewski, and David Pinsof discuss how early evolutionary approaches linked selection pressures to social organization.
↗ 12:03 – 16:51Leda Cosmides explains the flaw of fitness teleology, clarifying that natural selection shapes cognitive mechanisms and design features rather than driving conscious motives to spread genes. Leda Cosmides, Dave Pietraszewski, and David Pinsof analyze George Williams' foundational 1966 book on adaptation and natural selection.
↗ 16:51 – 24:04Leda Cosmides discusses historical critiques of radical behaviorism, focusing on Herrnstein's opposition to Skinner and the influential findings of John Garcia's taste aversion experiments with rats. The speakers examine how these studies challenged the equipotentiality assumption and the role of psychological similarity spaces.
↗ 24:05 – 31:04Leda Cosmides describes her early exposure to cognitive psychology methods and how she repeatedly encountered a fellow student, John Tooby, whose ideas matched her own during graduate seminars. Dave Pietraszewski and David Pinsof listen as Cosmides recounts Tooby's background in physics, his inspiration from science fiction and Schrödinger, and his unconventional path through Harvard's psychology department under the dominant influence of behaviorism.
↗ 36:09 – 43:09Leda Cosmides discusses the necessity of cognitive mechanisms and mental structure to overcome combinatorial explosion problems like Quine's gavagai indeterminacy. With input from Dave Pietraszewski and David Pinsof, they explore historical figures like Hume and Quine, examining how innate predispositions challenge strict blank-slate empiricism and behaviorist assumptions in psychology.
↗ 43:09 – 48:12Leda Cosmides and the hosts discuss the historical gap between sociobiology's focus on ultimate selection pressures and the necessary role of proximate cognitive mechanisms. Cosmides explains how early sociobiologists often overlooked the phenotype and how the cognitive revolution provided the missing information-processing language needed to connect evolution to psychology.
↗ 48:12 – 57:50The speakers reflect on the extent to which the computational and adaptationist level of description is understood today. Cosmides notes that while application is still incomplete and many researchers are not fully adaptationist, the field has improved immensely compared to early psychology when evolutionary principles were entirely absent.
↗ 57:51 – 1:00:15Dave Pietraszewski, David Pinsof, and Leda Cosmides discuss the difficulty of moving past folk psychology and adopting an engineering, adaptationist perspective on the human mind. They examine Richard Dawkins's extended phenotype and gene's-eye views compared to individual-level selection.
↗ 1:00:15 – 1:05:15Leda Cosmides recounts how she and John Tooby discovered key figures like Martin Daly, Margot Wilson, and Don Symons, discussing Symons's work on adaptationist analysis in primates and human sexuality, as well as the famous bet between Symons and Don Brown regarding human universals.
↗ 1:05:15 – 1:12:16Leda Cosmides discusses her collaborative research with Ricardo Guzman in Chile, challenging traditional views from Tversky and Kahneman regarding human rationality and transitive preferences. With attribution to Guzman, Cosmides explains how presenting moral trade-offs reveals that people actually make rational choices, behaving as if they generate utility functions.
↗ 1:12:16 – 1:17:36Leda Cosmides, Dave Pietraszewski, and David Pinsof examine how economists use utility functions to predict market behavior without modeling individual minds. They contrast this with experimental economics and evolutionary psychology, noting that Vernon Smith and his colleagues showed human preferences extend beyond narrow monetary self-interest.
↗ 1:17:38 – 1:24:19Dave Pietraszewski, David Pinsof, and Leda Cosmides discuss how experimental economics and behavioral economics approach human decision-making differently. Cosmides emphasizes the importance of understanding the historical background and underlying assumptions of different academic disciplines rather than dismissing them, noting that assuming people are intelligent and trying to solve specific problems aids interdisciplinary translation.
↗ 1:24:19 – 1:31:27The speakers discuss how moral and political reasoning often involves discovering neglected aspects of a problem rather than just following expectations or calculating utility functions. They also reflect on scientific maturity, noting that dismissing unfamiliar research as "dumb" hinders learning, and examine alternative academic publishing models.
↗ 1:36:22 – 1:45:28As the interview concludes, Leda Cosmides reflects on the decades-long impact of evolutionary psychology on intellectual life and everyday culture, expressing amazement at how widely evolutionary thinking and ancestral perspectives have been adopted across various domains like health and diet.
↗ 1:45:29 – 1:48:22Leda Cosmides, Dave Pietraszewski, and David Pinsof discuss the challenges of terminology in evolutionary psychology, specifically reflecting on the use of the term 'innate' versus 'reliably developing species-typical mechanism' or 'adaptation'. They discuss how misunderstandings by critics or researchers do not necessarily invalidate a useful framing or metaphor, and explore why clarity and intellectual honesty matter more than trying to please everyone.
↗ 1:48:22 – 1:55:18Hosts Dave Pietraszewski and David Pinsof introduce guest Tadeg Quillien from the University of Edinburgh to discuss the complex and abstract topic of causality. The conversation explores the intellectual history of Edinburgh, referencing David Hume's empiricism and his foundational philosophical problems regarding induction, correlation, and how humans infer causal relationships from observations.
↗ 0:00 – 11:02Dave Pietraszewski, David Pinsof, and Tadeg Quillien discuss the limitations of correlational models in science and cognition, comparing them to fragile towers of blocks. They examine how the human mind constructs causal relationships rather than merely tracking sensory data, drawing parallels to how we project mental states or ownership onto the world.
↗ 12:03 – 15:38Tadeg Quillien, Dave Pietraszewski, and David Pinsof discuss whether the causal cognition literature is evolutionary, noting that it employs functionalist assumptions and Bayesian optimality analyses. The speakers examine the debate surrounding domain generality versus functional specificity in the mind, critiquing traditional views of domain concepts.
↗ 24:06 – 32:02Host Dave Pietraszewski and guest Tadeg Quillien discuss experimental research on probabilistic inference in social domains, specifically how people infer others' welfare trade-off ratios and how these inferences predict emotions like gratitude and anger. Drawing on Aaron Sell's work, the speakers explain that anger is driven by perceived disregard rather than absolute payoff losses.
↗ 48:09 – 52:25Dave Pietraszewski, David Pinsof, and guest Tadeg Quillien discuss the limits of complex quantitative and structural equation models in science. They compare these to simple computational models, such as the evolutionary design of anger and gratitude, and explain Bayesian inference as a way to quantify uncertainty and beliefs using probabilities.
↗ 1:00:10 – 1:08:40The speakers examine how psychological design narrows down complex causal chains to actionable points of intervention, discussing examples like forest fires and human decision-making from an evolutionary perspective.
↗ 1:08:41 – 1:12:11Tadeg Quillien outlines a parsimonious explanation where people simulate multiple counterfactual possibilities in proportion to their relevance and compute correlations to make causal judgments. The hosts and guest also consider whether these simulations occur unconsciously or via evolved cognitive shortcuts.
↗ 1:30:04 – 1:36:20The hosts and Tadeg Quillien explore theory of mind, examining the evolutionary importance of social cognition, the challenge of attributing mental states like desires and beliefs, and how meta-representations and false-belief tasks function in predicting human behavior.
↗ 1:41:49 – 1:48:22Host Dave Pietraszewski and guest Tadeg Quillien discuss the cognitive architecture of theory of mind, arguing against the naive view that humans continuously run full simulations of other brains. Instead, Quillien explains how agents use a simpler model featuring a physical representation of the world combined with binary tags for shared knowledge, balancing predictive power with memory constraints.
↗ 1:48:22 – 1:55:06David Pinsof and Tadeg Quillien discuss whether minor tweaks or presets to an existing self-simulation engine can explain how we predict others' behavior. Quillien explains that sharing the same physical world makes this strategy efficient, and outlines how optimizing these computational models can generate predictions about non-human primates and tasks like the accidental true belief task.
↗ 1:55:08 – 2:00:25The hosts and Tadeg Quillien discuss how simulated agents and non-human primates handle complex scenarios with limited information processing capacity. Following this, Tadeg shares his intellectual journey from political science and David Hume to cognitive science and evolutionary perspectives under Pascal Boyer.
↗ 2:00:25 – 2:05:10Dave Pietraszewski, David Pinsof, and guest Mike McCullough discuss parent-offspring conflict, evolutionary cost-benefit landscapes, and how punishment and moral rules function as communications about social expectations and the anticipated reactions of impartial third parties.
↗ 24:04 – 28:12Hosts Dave Pietraszewski and David Pinsof discuss with guest Mike McCullough how children and adults perceive fairness and impartiality, linking institutional authority to the presence of real or symbolic power. They explore how perceived fairness often depends on the ability to impose costs or enforce social outcomes.
↗ 36:06 – 37:40Guest Mike McCullough discusses his research trajectory from counseling psychology to evolutionary social psychology, emphasizing that emotions like revenge, gratitude, and envy function as mechanisms for tracking costs and benefits. The speakers compare treating the emotional symptom without understanding its evolutionary cause to removing a cough in pneumonia.
↗ 37:40 – 48:09Host David Pinsof and guest Mike McCullough discuss how revenge and forgiveness stem from evolved psychological systems. Rather than viewing negative emotions or maladaptive forgiveness as purely irrational, the speakers explore how individuals weigh costs and benefits within relationships, sometimes leading to difficult decisions in harmful or abusive circumstances.
↗ 48:09 – 55:33Dave Pietraszewski, David Pinsof, and Mike McCullough discuss the profound complexities and difficult judgment calls involved when state actors and police intervene in severe domestic disputes. The speakers reflect on an evolutionary perspective of the human condition, noting that systemic social problems are deeply intricate and resistant to simple solutions or quick fixes.
↗ 1:00:10 – 1:06:18The speakers share personal reflections on committee work, institutional policies, and the limitations of predicting second-order effects in large human populations. They adopt a tragic view of human nature, critiquing the overconfident solutions often proposed by social scientists and arguing for greater humility in governance and intervention.
↗ 1:06:19 – 1:12:12The speakers evaluate traditional evolutionary theories of costly signaling, arguing that human communication assessment is far more sophisticated. Rather than relying on a single cost metric, recipients act as evidence collectors making inferences based on base rates, regression to the mean, past behavior, and the potential costs of being wrong.
↗ 1:20:52 – 1:24:13Dave Pietraszewski, David Pinsof, and guest Mike McCullough discuss how humans integrate multimodal sensory data in real-time decision making. They explore the evolved logic of information search, introducing the concept of strategic ignorance where individuals may deliberately choose to avoid acquiring certain information because search is costly and may not alter outcomes.
↗ 1:24:13 – 1:28:41Hosts Dave Pietraszewski and David Pinsof introduce repeat guest Dan Conroy-Beam, discussing his work on the evolutionary biology of sex, sex roles, and gender. They explore the value of agent-based modeling as a computer simulation technique for studying complex social phenomena and individual psychology.
↗ 0:00 – 9:00Guest Dan Conroy-Beam and hosts Dave Pietraszewski and David Pinsof discuss the limitations of purely verbal theorizing in psychology and how formal agent-based models uncover hidden assumptions. Conroy-Beam shares how trying to understand mating psychology and speed-dating dynamics through computer simulations led to his current methodological approach, inspired by Richard Feynman's dictum about creation and understanding.
↗ 12:02 – 19:30The speakers explore Conroy-Beam's current sabbatical project involving agent-based models on the evolution of sex and gender. They discuss how evolutionary biology models sex through parental investment and reproductive rates, while considering whether gender functions as a cultural signaling mechanism for underlying reproductive strategies.
↗ 19:30 – 24:05Guest Dan Conroy-Beam and hosts discuss the inadequacies of standard psychological definitions of sex and gender. Conroy-Beam argues that definitions from institutions like the APA are overly anthropocentric, rely on flawed indicators like chromosomes or genitalia, and fail to capture biological realities across the diversity of life or offer clear distinctions regarding gender.
↗ 24:06 – 30:43The speakers explore Dan Conroy-Beam's agent-based models investigating the evolutionary origins of sexual reproduction. Conroy-Beam explains how he used agent-based simulations to test hypotheses about why sexual reproduction evolved despite its inherent costs, focusing on coevolutionary arms races between hosts and pathogens.
↗ 30:43 – 36:11Dave Pietraszewski, David Pinsof, and guest Dan Conroy-Beam discuss the evolutionary origins of sexual reproduction, highlighting how selection pressures like pathogens shaped fundamental biological mechanisms rather than modern everyday conveniences.
↗ 36:11 – 37:22Dan Conroy-Beam explains how the evolution of sexes emerges from a quality-quantity trade-off in gamete production, where agents evolve bimodal distributions of large and small gametes based on energy budgets and reproductive strategies.
↗ 37:23 – 48:13Guest Dan Conroy-Beam discusses evolutionary models examining how gamete production strategies shape sex differences in mate competition and parenting behavior. He explains with attribution to evolutionary principles that small gamete producers are favored to engage in costly competition, whereas large gamete producers evolve higher parental investment adaptations, though these outcomes depend heavily on ecological assumptions like sex ratios and travel time.
↗ 48:13 – 54:10David Pinsof and Dan Conroy-Beam explore what defines biological sex, considering phenomena like sex-role reversals in phalaropes and concluding that gamete production provides a universal definition. They argue that sex operates as an abstract conceptual optimum shaped by selection and ecology rather than a fixed physical trait, while noting that human psychological intuitions about sex create challenges for scientific understanding.
↗ 54:10 – 1:00:17Host Dave Pietraszewski, David Pinsof, and guest Dan Conroy-Beam discuss the biological definition of sex, debating whether it should be framed around adaptations or as the equilibrium of selection pressures on gamete size. They also differentiate sex from sex roles such as parental investment and competition.
↗ 1:00:18 – 1:06:57The speakers transition to discussing gender, which Dan Conroy-Beam defines as a set of folk theories about how sex manifests in a particular ecology. They explore how human adaptability across diverse foraging niches requires learning local subsistence strategies, technologies, and social structures.
↗ 1:06:57 – 1:12:19Dave Pietraszewski, David Pinsof, and Dan Conroy-Beam discuss how humans act as intuitive socioecologists, learning lifeways and foraging strategies adapted to their local ecology over generations rather than evolutionary time. They also examine how status games are tethered to ecological resources and the developmental psychology of learning these cultural practices.
↗ 1:12:19 – 1:19:15Dan Conroy-Beam explains how biological sex differences, such as internal gestation and lactation, interact with ecological demands to shape sexual divisions of labor and optimal lifeways. The speakers also consider how psychological predispositions, such as risk-taking, contribute to the development of gender roles and cultural lifeways.
↗ 1:19:16 – 1:24:22Dan Conroy-Beam and the hosts discuss computational models of agents managing households, gathering resources, and balancing parenting with foraging. Conroy-Beam explains how environmental predictability shapes whether selection favors genetically encoded foraging strategies or reinforcement learning mechanisms, highlighting how social learning allows agents to adapt to ecological demands.
↗ 1:24:22 – 1:32:50The speakers explore how these computational models provide theoretical teeth for understanding gender identity and expression. Dan Conroy-Beam suggests that gender represents an individual's model of how sex manifests in their specific ecology, connecting evolutionary history and developmental psychology.
↗ 1:32:50 – 1:36:23Dave Pietraszewski, David Pinsof, and guest Dan Conroy-Beam explore how intrasexual competition and sexual divisions of labor shape gender expression and signaling. They discuss how members of each sex signal prototypical traits such as strength, risk-taking, health, and fertility to attract mates and navigate social roles.
↗ 1:36:24 – 1:39:24The speakers discuss why individuals care about others' gender concepts, focusing on mating markets, offspring socialization, and environmental stability. Dan Conroy-Beam explains a model of gender policing where parents intervene in offspring behavior based on environmental stability, which can generate cultural conflicts and intergenerational tensions over mate preferences and lifeways.
↗ 1:39:25 – 1:48:27Host Dave Pietraszewski, David Pinsof, and guest Dan Conroy-Beam discuss how individuals tailor their life ways and strategies based on their unique inherited traits and ecologies, linking individual differences and niche construction to gender and behavioral strategies.
↗ 1:48:27 – 1:50:55Dave Pietraszewski, David Pinsof, and guest Dan Conroy-Beam discuss how to frame Dan's upcoming paper. Rather than being self-indulgent, they agree that starting from evolutionary first principles provides a valuable causal framework and a much-needed synthesis of gender for the field.
↗ 2:00:29 – 2:02:41Hosts Dave Pietraszewski and David Pinsof, joined by co-host Zach Garfield, introduce guest Ray Hames, a professor emeritus at the University of Nebraska-Lincoln. They discuss his pioneering contributions to the early wave of human behavioral ecology, his methodological expertise in time allocation data, and his extensive career studying subsistence-based communities.
↗ 0:00 – 6:23Ray Hames reflects on the challenges and controversies of applying mathematical models from evolutionary biology during the early days of human behavioral ecology. The speakers discuss early criticisms, the legacy of E.O. Wilson's sociobiology, and how oversimplified genetic determinism contrasted with flexible behavioral ecology models like optimal foraging theory.
↗ 6:24 – 12:05Dave Pietraszewski and David Pinsof discuss with Ray Hames whether human behavioral ecology ignored psychology, exploring the phenotypic gambit, the shift toward a hypothetico-deductive framework inspired by economics, and the rejection of group selection models.
↗ 12:05 – 20:17Dave Pietraszewski, David Pinsof, and Ray Hames discuss Napoleon Chagnon's larger-than-life personality in the field, his integration with the Yanomamo, and the extensive skills required for jungle hunting compared to Western methods. Hames attributes Chagnon's success and local respect to his outgoing nature, generosity, and sharp shooting ability.
↗ 36:13 – 44:37Ray Hames shares his experiences presenting research at academic conferences, noting a growing hostility toward scientific and evolutionary approaches within the American Anthropological Association. He and the hosts discuss how organizations like the Human Behavior and Evolution Society provided a much more welcoming intellectual home for empirical anthropological work.
↗ 44:38 – 48:18Dave Pietraszewski, David Pinsof, and guest Ray Hames discuss intergenerational resource transfers, contrasting the role of elders in hunter-gatherer societies where they are valued repositories of wisdom with modern Western societies where older individuals are often viewed as economic costs.
↗ 1:00:22 – 1:09:10The speakers explore homosexuality as an evolutionary mystery from a Darwinian perspective, discussing how cultural expectations around marriage, reproduction, and female sexual fluidity relate to relaxed selection pressures on heterosexuality.
↗ 1:09:11 – 1:12:24Host Dave Pietraszewski, David Pinsof, and guest Ray Hames discuss how social norms regarding fertility and patriarchy influence sexual orientation and gender variation across different societies. They explore cross-cultural documentation of third and fourth genders, noting how behavior and preference are disentangled within diverse social systems.
↗ 1:12:24 – 1:18:28The speakers examine evolutionary puzzles surrounding sexual orientation, specifically how traits leading to zero direct fitness persist. They discuss Ray Blanchard's birth order model and fraternal birth order effects as a promising biological mechanism related to prenatal androgenization, alongside classic literature recommendations in evolutionary behavioral sciences.
↗ 1:18:29 – 1:24:26Ray Hames, Dave Pietraszewski, and David Pinsof discuss foundational scholarly influences in behavioral ecology and evolutionary anthropology, including Richard Alexander and Don Simons, reflecting on graduate school experiences, academic mentorship, and the history of evolutionary approaches to human behavior at institutions like UCSB and Berkeley.
↗ 1:24:27 – 1:30:28The speakers discuss the controversy surrounding Napoleon Chagnon and the book Darkness in El Dorado, characterizing it as a heavily flawed hit job driven by opposition to evolutionary approaches and Chagnon's findings on warfare, while highlighting the actual humanitarian vaccination efforts during the measles epidemic.
↗ 1:30:29 – 1:36:27Hosts Dave Pietraszewski and David Pinsof introduce the episode with guest Steve Neuberg, discussing the sociology of science and how Steve bridged social psychology and evolutionary theory. Steve then reflects on his early academic journey, starting as a premed biology major before discovering social psychology through an animal behavior and large introductory psychology class at Cornell.
↗ 0:00 – 6:09Steve Neuberg recounts becoming a psychology major at Cornell, working with early mentors like Tom Gilovich and John Bargh, and conducting undergraduate observational studies on social norms and sex roles. He also discusses his subsequent graduate school decisions and working with Susan Fiske to integrate motivation into cognitive models.
↗ 6:09 – 12:05Host Dave Pietraszewski, David Pinsof, and guest Steve Neuberg discuss Neuberg's early career in social cognition focusing on motivation and outcome dependency. Neuberg explains how reading Robin Fox's paper on stereotyping and prejudice as an adaptation prompted him to think about his own work on individuation and social contexts through an evolutionary lens.
↗ 12:05 – 16:34Steve Neuberg recounts a pivotal conversation about stigma on a boat with Brenda Major and Jenny Crocker during a Dartmouth conference, which led him to reject arbitrary views of deviance and instead view stigma as a mechanism of social control that helps human groups succeed. The hosts and guest also discuss psychology's empirical receptivity to evolutionary perspectives.
↗ 16:35 – 24:08Steve Neuberg discusses with Dave Pietraszewski and David Pinsof how he approaches presenting evolutionary ideas in social psychology. Unlike the traditional Santa Barbara method of deriving hypotheses strictly from deep first principles, Neuberg often starts with known social phenomena and works backward, which he suggests makes evolutionary concepts more approachable and less threatening to traditional social psychologists.
↗ 24:08 – 30:32Steve Neuberg, Dave Pietraszewski, and David Pinsof explore the ideological resistance and misunderstandings surrounding evolutionary research on stereotypes, prejudice, and sex differences. Neuberg notes that critics often fear evolutionary explanations imply genetic determinism or kernels of truth regarding race and gender, but emphasizes that empirical data ultimately reveal deeper nuance in human social cognition.
↗ 30:32 – 36:10Steve Neuberg and the hosts discuss the relationship between traditional social psychology and evolutionary approaches, emphasizing task analysis, phenomenon-first versus adaptation-first research strategies, and the value of integrating deep evolutionary logic with real-world observations of complex phenomena.
↗ 36:10 – 42:10The speakers examine why some psychologists remain skeptical or resistant to evolutionary perspectives, comparing different appetites for explanatory depth, scientific aesthetics, and the analogy of trying to fix a complex machine without knowing its evolved functions.
↗ 42:13 – 48:12Dave Pietraszewski, David Pinsof, and guest Steve Neuberg discuss how academic theories serve as coalitional markers and why younger scholars navigate changing socio-political climates, institutional decay, and pressures surrounding scientific acceptance differently across generations.
↗ 48:13 – 54:41Dave Pietraszewski, David Pinsof, and guest Steve Neuberg discuss the importance of taking scientific risks, proposing bold ideas even if they turn out to be wrong, and how psychology's replication and theory crises shape academic publishing, career incentives, and fear of failure.
↗ 1:00:15 – 1:07:37Host Dave Pietraszewski and guest Steve Neuberg discuss academic conflicts, historical debates in evolutionary psychology, mentoring networks like Irv Devore's influence, and reflections on scholarly rivalries.
↗ 1:24:23 – 1:30:24Guest Steve Neuberg explains the affordance management approach to stereotypes and prejudice, highlighting recent work by colleagues on directed stereotypes and relational behavioral inclinations towards specific groups.
↗ 1:30:24 – 1:36:26Steve Neuberg and David Pinsof discuss how prejudice and stereotypes involve complex emotional profiles rather than a simple positive-negative continuum. They explore research on anti-Semitism, noting how perceived political alliance and enemy structures predict negative attitudes, and reflect on the functional complexity of intergroup conflict from an evolutionary perspective.
↗ 1:36:26 – 1:41:57The speakers examine why researchers often resist complex models of prejudice, suggesting that acknowledging structural solutions can feel discouraging for psychologists focused on individual interventions. Steve Neuberg then emphasizes the importance of mentoring younger generations of scientists to advance these complex evolutionary frameworks.
↗ 1:41:58 – 1:48:28Dave Pietraszewski and David Pinsof share anecdotes and colorful stories about evolutionary biologist Robert Trivers before officially concluding the episode and thanking their guest Steve Neuberg and their audience for listening.
↗ 2:01:20 – 2:02:20Hosts Dave Pietraszewski and David Pinsof celebrate their podcast's one-year anniversary while attending the Human Behavior and Evolution Society Conference in Rabat, Morocco. They discuss meeting listeners, the vibrant exchange of ideas at the conference, and highlight plenary speaker Hanako Kokko.
↗ 0:00 – 3:18Guest Brett Beheim joins the hosts to discuss a plenary talk by Stephen Vasey on the institutional growth of cultural evolution. They explore whether cultural evolution should function as an independent discipline or a set of cross-disciplinary techniques, drawing parallels to the historical Modern Synthesis in biology.
↗ 3:21 – 12:00Dave Pietraszewski and David Pinsof discuss the historical success of the modern synthesis in evolutionary biology, driven by unified modeling frameworks and empirical integration. They contrast this with the fragmented state of current social science, arguing that a similar conceptual unity is urgently needed.
↗ 12:01 – 12:54Hosts Dave Pietraszewski and David Pinsof discuss recovering from the HBES conference, missing guests due to illness, and whether natural selection can be properly described as designing traits, contrasting a passive filtering process with the design stance.
↗ 0:00 – 5:08Dave Pietraszewski and David Pinsof discuss the limitations of relying solely on folk psychology for scientific explanation. They argue that science requires generalizable principles and frameworks rather than merely cataloging intuitive behaviors. The speakers examine how natural selection provides the necessary non-random explanation for complex organizational systems, contrasting intuitive black-box outputs with mechanistic and teleological design stances.
↗ 12:01 – 15:28The hosts explore whether natural selection can be understood as literal design rather than a mere metaphor, arguing that functional means-end systems arise from gene frequency changes and evolutionary filtering. They suggest that even human intelligence and cultural evolution are underpinned by Darwinian trial-and-error processes, ultimately demonstrating that the design stance remains indispensable for understanding biological machinery.
↗ 15:28 – 24:02Dave Pietraszewski and David Pinsof discuss the application of functional design thinking to biology and the human mind. They explain that while viewing the mind through a design stance is useful, it requires a careful focus on ancestral environments and ecologies rather than assuming a simplistic teleology of maximizing fitness in real time.
↗ 24:02 – 28:42The hosts explore common pitfalls in evolutionary thinking, such as fitness teleology and slogan-like concepts like short-term versus long-term mating or genetic quality. They emphasize that unlike traditional organs, the brain is an information-contingent adaptation designed to process ecological cues and generate behavioral variation.
↗ 28:42 – 36:05Dave Pietraszewski and David Pinsof discuss how universal information processing mechanisms produce diverse behavioral outcomes across different ecologies. They explain that misunderstandings of evolutionary psychology often stem from viewing human motivations and design through an intentional folk-psychology lens rather than recognizing that underlying fitness goals lead to varied contextual strategies.
↗ 36:05 – 40:43Following an abrupt provisional recording ending, Dave Pietraszewski and David Pinsof chat with guest Greg Bryant about recent conferences like HBES. They discuss community unification within the evolutionary social sciences, and Bryant shares findings from his bioacoustics research on how volitional laughter and nonverbal vocalizations function as emotional and valence signals.
↗ 40:44 – 45:12Hosts Dave Pietraszewski and David Pinsof introduce the episode and guest Josh Ackerman, discussing the psychology of disease avoidance, emotional profiles like disgust versus fear, and exploring Ackerman's academic background and early attraction to evolutionary biology and behavioral science.
↗ 0:00 – 6:41Dave Pietraszewski, David Pinsof, and guest Josh Ackerman discuss the fundamental role of infection and pathogens in shaping human psychology, physical evolution, and social behavior. They draw parallels between the constant pressure of pathogens and physical laws like gravity, noting how modern sanitation has led to taking infection risks for granted.
↗ 12:03 – 18:26Dave Pietraszewski, David Pinsof, and guest Josh Ackerman discuss parental overprotectiveness, exploring how factors such as fertility rates, health insurance structures, societal blame, and institutional risk-aversion shape modern approaches to childhood risk and safety.
↗ 24:06 – 26:43Josh Ackerman explains how ecological features like population density and local sex ratios influence human decision-making and risk-taking strategies. The hosts and guest examine how male-skewed environments affect mating competition, financial risk choices, and how different need thresholds drive varying forms of risk acceptance.
↗ 26:43 – 36:08Dave Pietraszewski, David Pinsof, and Josh Ackerman discuss how ecological factors such as population density influence behavioral strategies and risk-taking. They explore whether organisms mentally represent macro-level population variables or rely on local, on-the-ground experiences and immediate social cues to navigate competition and resource acquisition.
↗ 36:08 – 44:54The speakers examine whether temporary social contexts, such as single-sex group gatherings, reflect the same underlying calculations as long-term environmental exposures like chronic sex ratios. Josh Ackerman notes that short-term priming and temporary effects are often less reliable than individual differences or prolonged developmental exposure.
↗ 44:54 – 48:12Hosts Dave Pietraszewski and David Pinsof chat with guest Josh Ackerman about reality TV dynamics, noting how intense zero-sum competition in shows like The Bachelor coexists with deep friendships. They then explore the evolutionary psychology of friendship, comparing how men and women conceptualize and manage friendships versus kinship.
↗ 48:12 – 55:10Host David Pinsof and guest Josh Ackerman discuss whether a concern about germs leads individuals to restrict their social interactions or if broader life resource limitations drive both health worries and smaller social networks. Ackerman explains that individuals highly concerned about infection tend to hold stricter standards for their friends, effectively walling themselves off from social opportunities, rather than merely having fewer opportunities due to external constraints.
↗ 1:00:13 – 1:05:01The speakers examine what predicts infection worry, noting that a history of infection during development plays a role, while physiological immune system links remain messy and complex. They then explore why explicit germ fear and disgust are distinct systems, with Ackerman citing Mark Schaller's distinction between reactive disgust and proactive cognitive responses to mitigate threats lacking sensory cues.
↗ 1:05:01 – 1:12:16Dave Pietraszewski, David Pinsof, and guest Josh Ackerman discuss the relationship between the behavioral immune system and outgroup avoidance. They examine how cultural traditions and hygiene practices shape perceptions of infection risk from outsiders, noting that differences in norms can trigger suspicion and prejudice, which political actors may exploit.
↗ 1:12:16 – 1:20:29The hosts and Josh Ackerman discuss the opacity of disease transmission historically, leading people to rely on rituals and heuristics. They explore error management logic where individuals risk being perceived as contamination sources, and Ackerman introduces his current research on how people manage these social dilemmas through the concealment of sickness.
↗ 1:20:30 – 1:24:20Host Dave Pietraszewski, David Pinsof, and guest Josh Ackerman discuss post-infection psychology, exploring why people hide signs of illness from others. While researchers initially anticipated concerns over contamination fear or anger, data reveals that most people hide illness due to goal prioritization, fear of missing out, or a sense of burdening others.
↗ 1:24:20 – 1:30:36Host Dave Pietraszewski, David Pinsof, and guest Josh Ackerman discuss the social psychology of concealing contagious versus chronic illnesses. They examine why people hide temporary sickness due to obligations like work, the lack of common knowledge norms around disclosure, and how contagious illnesses create unique potential for direct physical harm compared to other concealed identities.
↗ 1:36:26 – 1:39:55Kris Smith explains how conducting fieldwork with the Hadza challenged his theoretical assumptions about cooperation and partner choice. Rather than selecting campmates based on generosity or cooperative game behavior, the Hadza prioritize practical foraging skills like hunting ability, largely because strong communal sharing norms are already enforced by default.
↗ 6:48 – 12:03Dave Pietraszewski, David Pinsof, and Kris Smith discuss how ecological factors, resource concealability, and trait variance influence partner choice among the Hadza. They examine how living environments—such as villages versus the bush—alter sharing norms, wealth storage, and the relative emphasis placed on generosity versus productivity when selecting cooperative partners.
↗ 12:03 – 20:08Dave Pietraszewski, David Pinsof, and guest Kris Smith discuss how sharing norms and reputation operate in Hadza communities. They examine an anecdote about a man who murdered his wife yet remained integrated and supported by the group, illustrating that reputational costs may not always translate into severe real-world penalties due to ecological constraints and interdependence.
↗ 24:04 – 28:12The speakers examine human behavioral variation, cautioning against essentializing any single hunter-gatherer group as the definitive proxy for ancestral human nature. They explore how local ecologies, high interdependence, and the scarcity of outside alternatives shape community responses, favoring mediation and relationship preservation over costly ostracism or punishment.
↗ 28:13 – 36:05Host David Pinsof and guest Kris Smith discuss relational mobility, network size, and how replaceability shapes cooperation across different cultures, contrasting the high replaceability of the Western world with the irreplaceable social networks of the Hadza.
↗ 36:05 – 40:50Dave Pietraszewski, David Pinsof, and Kris Smith discuss the challenges of applying welfare trade-off ratio and social discounting tasks across different cultures and ecologies, such as among the Hadza and in Bangladesh, noting how local contexts, concrete realities, and perceptions of need can override standard experimental predictions.
↗ 48:07 – 54:48The speakers examine how formal education, Western abstraction, and hypothetical task structures influence participant responses. They highlight the value of an evolutionary framework in anthropology for keeping researchers grounded about what psychological measures actually capture in the field.
↗ 54:48 – 1:00:11Host Dave Pietraszewski, David Pinsof, and guest Kris Smith discuss the limitations of rigid theoretical frameworks and quantitative measures in social science. They examine the value of qualitative ethnography, real-life anecdotes, and open-ended observations to uncover overlooked phenomena, noting how qualitative insights often precede and enrich formal data collection.
↗ 1:00:11 – 1:03:15Guest Kris Smith and hosts Dave Pietraszewski and David Pinsof discuss long-distance relationship orientation (LDO), exploring how an interest in distant social ties can function as a partner choice mechanism and risk-buffering strategy against community-wide resource shocks, comparing findings across different cultural settings.
↗ 1:12:13 – 1:17:41Dave Pietraszewski, David Pinsof, and Kris Smith wrap up their conversation by discussing disease vector challenges in the field, local conceptualizations of climate and health issues, and Kris's personal experiences with mosquitoes during research trips.
↗ 1:24:13 – 1:29:25Hosts Dave Pietraszewski and David Pinsof introduce the podcast and guest Josh Snodgrass. They discuss the intersection of evolution, health, psychology, and social networks, highlighting how market integration and environmental shifts impact human physical and mental health in complex, non-straightforward ways.
↗ 0:00 – 3:48Josh Snodgrass joins the conversation to discuss his award-winning paper on lassitude—the emotion of being sick—and how it bridges human biology, human behavioral ecology, and evolutionary psychology. He explains the origins of the Shuar Project, detailing the impact of market integration and environmental change on health.
↗ 3:53 – 12:03Dave Pietraszewski, David Pinsof, and Josh Snodgrass discuss how indigenous communities experience market integration, highlighting the impact of inequality and racism. They examine how evolutionary psychology shapes social comparison, fitness, and striving within changing economic hierarchies.
↗ 48:13 – 51:39The speakers explore human needs, happiness, and meaning versus modern societal pressures in the United States. Josh Snodgrass compares human social environments to primate research by Robert Sapolsky, arguing that modern capitalist societies often misalign with our evolved psychological and physical needs.
↗ 51:40 – 1:00:15The hosts and Josh Snodgrass discuss how psychological science lags behind physical and chemical safety knowledge in modern societies. They examine cultural expectations around parenting, such as breastfeeding and independence, the challenges of establishing common knowledge on abstract health topics, and the role of cultural evolutionists in shaping public understanding.
↗ 1:00:15 – 1:07:29The speakers explore why academic disciplines study physical health and psychology as separate domains despite their deep biological interdependence. Snodgrass attributes this division to Western scientific reductionism, historical academic turf wars following the sociobiology debates of the 1960s and 1970s, and persistent resistance to integrating evolutionary psychology with human biology.
↗ 1:07:29 – 1:12:20Dave Pietraszewski, David Pinsof, and Josh Snodgrass discuss the false dichotomy between the mind and body, exploring how physiological systems, gut health, and mental health are deeply interconnected. They examine the tension between individual lifestyle interventions and broader structural or community-level changes, noting the challenges of navigating both scales in modern society.
↗ 1:12:20 – 1:17:18Hosts Dave Pietraszewski and David Pinsof introduce guest Pascal Boyer and his work on cultural evolution and cognition. Pascal Boyer discusses the persistence of certain beliefs and motivations in the human mind that remain unaffected by explicit argument or factual correction, using personal anecdotes about birthday reluctance and urban legends.
↗ 0:00 – 8:19Pascal Boyer reflects on traditional approaches to cultural evolution and religious concepts as cognitive attractors focused primarily on consumption and mental stickiness. He argues for an expanded perspective that examines the production side of culture, investigating why people actively generate specific cultural and religious ideas rather than assuming concepts are randomly invented daily.
↗ 8:19 – 12:05Pascal Boyer discusses how cultural evolution studies have traditionally focused on consumption rather than production. He argues that understanding cultural material, such as religious ideas and puritanical morality, requires examining the fitness interests of individuals who actively push these ideas onto others, drawing connections to the Paris School of Evolutionary Psychology.
↗ 12:05 – 17:48Host Dave Pietraszewski introduces Thomas Sowell's concept of constrained versus unconstrained political visions, asking how to reconcile it with alliance theory. David Pinsof and Pascal Boyer discuss the empirical challenges of measuring abstract worldviews, arguing that heritable traits and psychological dispositions likely matter indirectly by influencing group affiliations and coalition building.
↗ 48:11 – 56:13Pascal Boyer and David Pinsof examine how psychological mechanisms and neural computations operate beneath explicit political vocabulary. Drawing parallels to syntactic theory in linguistics, they suggest that coalitional thought relies on underlying logical principles and computational idioms that people are rarely consciously aware of or able to articulate directly.
↗ 56:14 – 1:00:17Pascal Boyer, Dave Pietraszewski, and David Pinsof discuss how folk psychology and folk economics shape political attitudes. They examine why voters lack strong incentives to correct primitive intuitions compared to professional economists, and contrast the constructive nature of scientific discussions with the coalitional dynamics of political discourse.
↗ 1:00:17 – 1:08:09Pascal Boyer explores the structural challenges facing social sciences, highlighting powerful incentives against finding correct models due to coalitional dynamics and group-centric political discourse. He also distinguishes between folk religion and doctrinal religion as distinct phenomena rather than a single category.
↗ 1:08:10 – 1:12:18The speakers examine how foundational questions can escape dogmatic academic departments and be pursued by researchers with fewer coalitional biases. They reflect on John Tooby's observations about the systemic barriers built into modern scientific institutions and the convenience of blaming the public or voters rather than flawed reward structures.
↗ 1:19:13 – 1:24:18Pascal Boyer, David Pinsof, and Dave Pietraszewski reflect on the state of evolutionary and foundational sciences. They discuss the advantages of researching neglected topics, the lack of mainstream attention for rigorous foundational work, and propose a collaborative, cumulative model inspired by the Bourbaki mathematicians to reduce redundant theorizing.
↗ 1:30:51 – 1:36:22Guest Pascal Boyer discusses with hosts Dave Pietraszewski and David Pinsof a grandiose project to produce foundational, authoritative reference texts for evolutionary social sciences. Boyer draws an analogy to mathematics' Bourbaki group, considering how such syntheses could help outsiders like historians or political scientists navigate complex models of human behavior and cooperation.
↗ 1:36:22 – 1:42:05Dave Pietraszewski, David Pinsof, and Lauren Ross discuss the ambiguity of the term 'mechanism' in science, examining how different types of causal systems and explanations matter for distinct research projects across various scientific disciplines.
↗ 12:04 – 15:52The speakers contrast the goals of evolutionary behavioral sciences with standard social sciences, highlighting the pursuit of functional schematics, evolutionary history, and deeper levels of explanation integrated with the natural sciences.
↗ 15:52 – 24:07Lauren Ross, Dave Pietraszewski, and David Pinsof discuss the challenges of integrating multiple evolved ontologies in psychology—such as folk physics, artifact systems, and theory of mind. They examine why intuitive, physical, billiard-ball causal models dominate public and scientific thinking, making abstract functional design stances and evolutionary perspectives seem unintuitive or speculative.
↗ 48:14 – 56:33David Pinsof pitches a framework for evaluating scientific explanations based on assumptions and predictive power, which Lauren Ross and Dave Pietraszewski critique and refine by discussing plausibility, breadth, and the temporal delay between theorizing unobserved mechanisms and gathering data to test them.
↗ 1:04:14 – 1:12:24Dave Pietraszewski, David Pinsof, and Lauren Ross discuss how functional and goal-oriented systems shape causal cognition and reverse-engineering. They examine how evolutionary psychology introduces mechanical levels and design accounts that transcend intentional descriptions, while addressing skepticism from researchers who favor more reductionist molecular or single-molecule approaches.
↗ 1:12:24 – 1:18:40The speakers explore how different fields define mechanisms, contrasting network mechanisms in neuroscience with reductive molecular biology. They also address common criticisms of adaptationism, analyzing the logic behind the just-so story objection and how functional predictions can be rigorously evaluated.
↗ 1:18:41 – 1:24:25Dave Pietraszewski, David Pinsof, and Lauren Ross discuss the common assumption that all causal explanations must be rooted in lower-level physiological or physical mechanisms. They examine examples from medicine and social science where higher-level structural factors, such as socioeconomic status or systemic racism, provide more useful explanations than purely physiological ones.
↗ 1:24:25 – 1:29:11David Pinsof and Lauren Ross debate whether scientific explanations must be consistent with adjacent lower levels of organization. Pinsof argues that psychological and cognitive theories should not contradict evolutionary biology, while Ross questions whether higher-level life sciences must strictly align with fundamental physics.
↗ 1:29:12 – 1:36:30Dave Pietraszewski, David Pinsof, and guest Lauren Ross discuss whether higher-level sciences like psychology and chemistry need to be beholden to fundamental physics. They examine how evolutionary theory and biology constrain psychological models, share historical examples from chemistry and molecular biology regarding functional discovery, and reflect on pluralism in scientific explanation.
↗ 1:36:30 – 1:46:49As the episode concludes, the hosts discuss time perception research from an adaptationist perspective, share humorous remarks, and direct listeners to the show notes for details on Lauren Ross's published books and papers in philosophy of science.
↗ 1:46:52 – 1:48:31The hosts playfully explore extreme commitment signals like face tattoos as a way to filter uncommitted evolutionary psychologists, before wrapping up the episode with advice on understanding differing scientific perspectives.
↗ 1:50:04 – 1:52:27Hosts Dave Pietraszewski and David Pinsof introduce guest Michelle Sugiyama, discussing her research into the evolutionary psychology of storytelling, oral cultures, cultural transmission, and the broader pedagogical functions of arts and leisure in hunter-gatherer societies.
↗ 0:00 – 4:16The hosts and Michelle Sugiyama explore how hunter-gatherer nomenclature, including animal, place, and moon names, encodes ecological knowledge and practical affordances efficiently to aid memory, transmission, and survival.
↗ 4:17 – 12:04David Pinsof and Michelle Sugiyama explore how storytelling serves as an efficient mode of transmitting ecological knowledge by mapping directly onto human agency detection systems. They discuss how narrative ingredients like characters, settings, conflict, and emotional intensity or graphic elements make stories highly memorable and engaging.
↗ 17:37 – 24:06Dave Pietraszewski, David Pinsof, and Michelle Sugiyama examine how oral and hunter-gatherer cultures use stories featuring distant time and talking animals. They discuss whether counterfactual elements in myths function as analogical reasoning and provide cognitive flexibility for teaching ecological lessons.
↗ 24:06 – 29:36The speakers discuss how counterfactual reasoning and fictional narratives serve as thought experiments and mental models for understanding causality and ecological challenges. They compare fictional thought experiments to scientific hypothesis testing and introduce questions about why story producers share these narratives.
↗ 29:36 – 36:10Dave Pietraszewski, David Pinsof, and Michelle Sugiyama discuss storytelling as an evolutionary form of cooperation and information exchange. They examine how sharing knowledge helps establish cooperative relationships and reputation. The speakers also explore specialization in hunter-gatherer societies, where individuals contribute through specific roles like storytelling, healing, or hunting, and how elders function as communal knowledge keepers.
↗ 36:10 – 41:36The speakers discuss the evolved psychology surrounding public speaking, shyness, and the high stakes of capturing joint attention in human groups. David Pinsof compares attention to a limited communal resource, likening excessive talking without offsetting benefits to greed. Finally, Michelle Sugiyama reflects on whether the cognitive science of storytelling receives adequate attention and respect within evolutionary psychology.
↗ 41:36 – 48:10Dave Pietraszewski, David Pinsof, and guest Michelle Sugiyama discuss the structure of narratives in cognitive science and literary studies, the role of humor in traditional storytelling, and how trickster stories use humor and ridicule to reinforce social norms and improve memorability.
↗ 48:10 – 53:32The speakers examine the function of songs in traditional stories, rituals, and child-rearing as mnemonic devices for ecological and zoological knowledge, and debate whether storytelling and song are distinct evolutionary adaptations or cultural inventions built upon existing cognitive capacities.
↗ 53:32 – 1:00:16Dave Pietraszewski, David Pinsof, and guest Michelle Sugiyama discuss cultural evolution driven by instrumental reasoning and the mechanisms small-scale hunter-gatherer societies use to maintain story fidelity and enforce social norms. They examine how audiences correct narrators, how unauthorized storytelling carries social consequences, and how traditional communities place checks on misinformation and antisocial behavior.
↗ 1:00:16 – 1:07:09The hosts and Michelle Sugiyama explore how stories can be utilized for political, coalitional, and manipulative goals, comparing modern propaganda with traditional oral war histories. They discuss whether ancestral storytelling mirrors modern polarizing rumors and how small-scale societies employ war narratives primarily for education and tactical preparation rather than immediate political incitement.
↗ 1:07:09 – 1:12:17Dave Pietraszewski, David Pinsof, and guest Michelle Sugiyama discuss how historical narratives and stories can recount atrocities to instill fear, motivate groups, and perpetuate animosity against outgroups. They examine how propaganda shapes perceptions of enemy formidability and moral character to facilitate collective action, comparing these dynamics to interpersonal biases.
↗ 1:12:17 – 1:17:06As the episode concludes, Dave Pietraszewski and David Pinsof invite guest Michelle Sugiyama to share an overview of her research background, current work on mimicry in hunter-gatherer games, and her transition from literary studies to evolutionary psychology and archival research on oral storytelling.
↗ 1:17:06 – 1:23:15Guest Antoine Marie joins David Pinsof to discuss the pitfalls of studying politics, identifying cognitive blindness and a lack of attention to individual mental computation as major issues in social sciences. They explore how Pleistocene-evolved minds function in modern mass societies and discuss the academic landscape of evolutionary research in France.
↗ 5:39 – 12:01Host Dave Pietraszewski and guest Antoine Marie discuss why applying a computational and mechanistic framework to social and political behavior feels counterintuitive to people. They explore how folk psychology, perceived cultural variation, and resistance to reductionism create intellectual barriers to adopting evolutionary psychological approaches to politics.
↗ 12:02 – 16:59Hosts and guest examine the dual challenges of studying politics through an evolutionary lens, discussing professional pushback, ideological dogmatism, and the dominance of social constructionism and Bourdieuian sociology in French academia. They highlight the importance of pedagogical good faith, viewpoint diversity, and managing the conflation of descriptive facts with moral implications.
↗ 16:59 – 24:07Host David Pinsof and guest Antoine Marie discuss the apparent contradiction between evolutionary theories emphasizing accurate beliefs about reality and the historical tendency of human groups to form competitive coalitions characterized by dogmatism, ideological orthodoxy, and low-cost abstract political beliefs.
↗ 24:07 – 29:34Dave Pietraszewski, David Pinsof, and guest Antoine Marie discuss whether political and anti-racist beliefs function as reflective beliefs that signal coalition loyalty rather than causal interventions. They explore how anti-racist activism can paradoxically trigger political backlashes and examine whether people hold genuine intuitive beliefs about abstract ideologies or use them primarily for social signaling.
↗ 36:07 – 42:07Host Dave Pietraszewski, guest Antoine Marie, and David Pinsof discuss whether extreme political violence and terrorism stem from genuine ideological beliefs or calculated status-seeking behaviors. They explore how social processes, family reputation, and individual life trajectories interact to motivate actions such as suicide bombing and mass shootings.
↗ 48:08 – 54:45The speakers examine the cognitive mechanisms behind self-sacrifice, discussing inclusive fitness, reciprocity, and the underexplored psychology of legacy and posthumous reputation. They conclude by highlighting the methodological difficulties and empirical barriers researchers face when studying extreme populations and public perceptions of martyrdom.
↗ 54:45 – 1:00:09Dave Pietraszewski, David Pinsof, and guest Antoine Marie discuss evolutionary perspectives on extreme behaviors, comparing suicidal political violence and ancient warfare strategies to Ed Hagen's research on suicidality as a rational signal in social power imbalances. They explore how hunter-gatherer raids and historical practices like seppuku relate to fitness, risk, and modern technological mismatch.
↗ 1:00:09 – 1:04:34Dave Pietraszewski, David Pinsof, and guest Antoine Marie discuss political psychology theories regarding sacred values, taboo trade-offs, and reputational signaling models of principal behavior. They analyze whether sacred values have true motivational traction or function as sincere posturing, and critique models of extreme individual imitation.
↗ 1:12:15 – 1:18:31Hosts Dave Pietraszewski and David Pinsof introduce the podcast episode and their guest, anthropologist Manvir Singh. They discuss the podcast's formatting, meta-discussions on names, and transition into a conversation about ancestral environments, Pleistocene megafauna, and the psychological resilience fostered by ancestral coexistence with formidable Ice Age animals.
↗ 0:00 – 9:11Dave Pietraszewski, David Pinsof, and guest Manvir Singh discuss error management psychology and bet-hedging as theoretical lenses for understanding superstition, magic, and ritual. They explore how asymmetries of costs in evaluating causal relationships can drive adaptive thresholds for superstitious behaviors, such as wearing lucky items or amulets, across different high-stakes contexts.
↗ 12:00 – 16:39Host Dave Pietraszewski and guest Manvir Singh discuss different accounts of magic and ritual, contrasting theories about intrinsic physiological benefits like stress reduction with Manvir Singh's error management and instrumental cost-benefit approach.
↗ 36:02 – 39:49The hosts and Manvir Singh explore the production side of shamanism, examining how specialist markets emerge and how low-efficacy rituals can function as high-cost signals of care, parental investment, and group loyalty.
↗ 39:49 – 48:07The speakers discuss whether low-efficacy ritual behaviors persist due to social reputational pressures and the tragedy of the commons. Dave Pietraszewski, David Pinsof, and Manvir Singh examine how individuals make inferences about others who deviate from group norms, debating whether these inferences rely on generalized signaling or contextual judgments and how cues can transform into intentional signals.
↗ 48:07 – 53:59Manvir Singh discusses his work with Luke Lowacki challenging the traditional evolutionary psychology assumption that humans evolved exclusively in small, mobile, egalitarian bands. He explains that environments with dense, rich resources often fostered larger, sedentary, hierarchical societies, suggesting we should rethink the diversity of human social structures throughout history.
↗ 53:59 – 1:00:09David Pietraszewski, David Pinsof, and guest Manvir Singh discuss the theoretical implications of the ancestral environment for evolutionary psychology. They examine how moving away from the assumption that ancestral human societies were exclusively small-scale and egalitarian opens up new hypotheses regarding selection pressures for large-scale cooperation and social hierarchy.
↗ 1:00:09 – 1:08:10The speakers reframe human evolutionary history away from the transition from tiny bands to large societies, arguing instead that humans evolved under conditions of intense climatic and environmental volatility. They connect this variability to the evolution of large brains capable of context-sensitive strategies and generalist-specialist niches.
↗ 1:08:11 – 1:12:11Hosts Dave Pietraszewski and David Pinsof discuss with guest Manvir Singh how Pleistocene climatic volatility and generalist adaptations shaped human extractive foraging, cognitive evolution, and the deep links between ecology and social organization.
↗ 1:12:11 – 1:16:43Guest Manvir Singh shares his current book project on early Indo-European mythology, detailing linguistic and mythological reconstructions, while hosts Dave and David conclude the episode by highlighting the vitality of evolutionary behavioral sciences.
↗ 1:16:44 – 1:24:14Hanno Sauer joins the hosts to discuss his work on social class, analyzing how socioeconomic status, signaling theory, and status competition shape political conflicts, identity politics, and modern evolutionary hangovers.
↗ 4:14 – 12:00Host Dave Pietraszewski, David Pinsof, and guest Hanno Sauer discuss how human desires for status and reputation stem from cultural learning and evolutionary adaptations. They examine how intense status competition can be zero-sum or negative-sum, drawing parallels to advertising, and frame modern societal challenges around persistent Hobbesian collective action problems.
↗ 12:00 – 19:37The speakers explore the evolutionary puzzle of how humans managed to scale up cooperation from small, kin-based ancestral groups to massive modern societies involving complete strangers, division of labor, and complex institutional toolkits.
↗ 19:37 – 24:05In this section, Dave Pietraszewski, David Pinsof, and guest Hanno Sauer discuss how complex global cooperation systems operate transparently or opaquely to individuals. Sauer invokes a naturalized version of Hegel's cunning of reason, comparing social structures and cultural evolution to spontaneous economic processes like Hayekian price signals where participants benefit from large-scale cooperation without needing to understand or plan it.
↗ 24:05 – 27:40Dave Pietraszewski, David Pinsof, and guest Hanno Sauer discuss the historical trajectory of human conflict, examining why large-scale warfare, slavery, and conquest persisted as norms for millennia. They explore the transition from zero-sum competition to positive-sum economic growth, and how group antagonism continues to be easily activated despite modern institutional frameworks.
↗ 36:11 – 44:44Dave Pietraszewski, David Pinsof, and Hanno Sauer discuss how moral progress functions as an outcome rather than a deliberate internal change in human nature. They explore the idea that moral insights, cooperation, and institutions are offloaded into the environment—much like cooking externalized digestion—allowing technology and material changes to drive societal improvements.
↗ 48:12 – 56:54Dave Pietraszewski, David Pinsof, and guest Hanno Sauer discuss whether modern society has truly achieved moral progress or merely adapted to new economic and ecological conditions. They debate whether ongoing conflicts reflect cultural atavisms rooted in outdated zero-sum resource mentalities, or if moral values are merely post-hoc rationalizations for shifts in material incentives and status games.
↗ 1:00:15 – 1:06:46The speakers examine what it means to learn as a society, focusing on the historical practice of slavery. Hanno Sauer argues that humanity fortuitously stumbled upon institutional arrangements that made slavery economically disadvantageous, while David Pinsof suggests that elaborate historical rationalizations for slavery indicate people were always intuitively uncomfortable with it.
↗ 1:06:46 – 1:12:16Hosts Dave Pietraszewski and David Pinsof introduce guest Athena Aktipis, discussing her wide-ranging research interests across the biological and social sciences. Aktipis explains how her work consistently revolves around the core theme of cooperation and conflict across multiple levels of organization, from cellular systems to human behavior.
↗ 0:02 – 5:24The discussion shifts to the concept of zombification and Richard Dawkins' idea of the extended phenotype. The speakers examine how organisms can hijack the behavior or biology of others, exploring evolutionary implications for understanding parasites, manipulation, and human social phenomena like cults and religions.
↗ 5:25 – 12:04Dave Pietraszewski, David Pinsof, and guest Athena Aktipis discuss how extended phenotype frameworks help explain interpersonal conflict and destructive behavior. Drawing on Hugo Mercier's work on epistemic vigilance, they explore human resistance to manipulation, propose the existence of a corresponding manipulation psychology, and analyze how perceived alignment or misalignment governs social coordination.
↗ 12:04 – 17:42The speakers apply signal detection theory to human assessments of interest alignment and misalignment, linking miscalibrations in these systems to conditions like borderline personality disorder. They also examine how feedback loops, memory reinterpretation, and information foraging influence social cognition, political outrage consumption, and the continuum between symbiosis and parasitism.
↗ 17:42 – 24:06Host David Pinsof, host Dave Pietraszewski, and guest Athena Aktipis discuss how shared threats, such as natural disasters, foster high levels of human cooperation and alignment. They examine how environmental challenges create feelings of interdependence, while institutional bottlenecks or failures can lead to cooperation fatigue and breakdown.
↗ 24:06 – 29:23The speakers explore the transition between positive-sum and zero-sum interactions, introducing concepts like cooperation energy and coordination capacity. Guest Athena Aktipis and host David Pinsof discuss how cultural events like Burning Man signal coordination capacity, and how bureaucratic structures can inadvertently undermine evolved human cooperative psychology.
↗ 29:23 – 36:11Host Dave Pietraszewski, guest Athena Aktipis, and host David Pinsof discuss how bureaucratic systems in institutions can block cooperation vortices. They examine how zero-sum resource competition and political power struggles can create low-trust environments where climbing power hierarchies replaces collective production.
↗ 36:11 – 40:04The speakers explore lower-level cooperation and conflict between younger and older generations, linking parent-offspring conflict to broader ancestor-descendant dynamics, institutional evolution, and economic ecologies that shift power between generations.
↗ 40:04 – 48:12Host Dave Pietraszewski and guest Athena Aktipis discuss the dynamics of zero-sum versus non-zero-sum situations in familial and social contexts, exploring how individuals navigate conflict and choose to expand shared resources rather than fight over fixed portions.
↗ 48:12 – 50:59Dave Pietraszewski, David Pinsof, and guest Athena Aktipis discuss the feeling of serendipity and connection, interpreting it through evolutionary theory as an emotional readout of positive assortment and cooperative potential. They examine how human brains detect alignment, cooperation energy, coordination capacity, and the absence of exploiters, while critiquing academic blind spots toward positive emotions and informal social phenomena.
↗ 1:00:13 – 1:08:49The speakers connect academic institutions and mentorship dynamics to ancestor-descendant conflict and extended phenotypes. Athena Aktipis outlines her diverse research and public engagement initiatives at Arizona State University through Cooperative Futures, detailing projects that apply the science of cooperation to emerging challenges such as artificial intelligence, interspecies fermentation, and public science communication.
↗ 1:08:49 – 1:12:19Athena Aktipis discusses her academic and entrepreneurial projects, including her work at ASU and Agentic Intelligence Systems. She describes organizing the Zombie Apocalypse Medicine Meeting as a playful framework for discussing challenging frontier topics and building cross-disciplinary collaboration, noting how shared language helps connect peers.
↗ 1:12:19 – 1:19:39Dave Pietraszewski and David Pinsof express their appreciation for guest Athena Aktipis, praising her courage and impact on the evolutionary behavioral sciences. Athena Aktipis responds by noting that pursuing fun and interesting work sets an example for others, creating a shared responsibility to show that such endeavors are possible.
↗ 1:24:19 – 1:25:46Kathrine Starkweather describes her ongoing anthropological fieldwork with the Shodogore boat-dwelling community in rural Bangladesh. She and the hosts discuss human behavioral ecology, examining how environmental constraints, extreme heat, and economic costs and benefits influence daily decisions, health, and family dynamics.
↗ 3:14 – 12:03Dave Pietraszewski, David Pinsof, and guest Kathrine Starkweather discuss how ecological differences and landscape accessibility shape fishing and trading strategies in rural Bangladesh. They examine the cost-benefit analyses behind economic decisions, physical versus economic risks, and the unique cultural niche that allows women to trade profitably.
↗ 24:05 – 31:20The speakers explore mating dynamics, marriage customs, and the influence of mothers-in-law within the Shodogore culture. They discuss how social groups mitigate safety risks during trading, examine patterns of monogamy and divorce, and compare human cooperative arrangements to broader evolutionary and cross-species patterns of mutual dependence.
↗ 31:20 – 36:07The speakers discuss the concept of transaction costs in economics and apply it to social life, loneliness, and institutional design. Dave Pietraszewski, David Pinsof, and guest Kathrine Starkweather explore how modern living arrangements have dramatically increased the barriers to social connection compared to ancestral and cross-cultural contexts, and David Pinsof suggests that humor evolved as an adaptation to reduce coordination costs.
↗ 48:09 – 54:19Dave Pietraszewski, David Pinsof, and guest Kathrine Starkweather discuss how superficial similarities and shared identifiers help groups solve coordination problems and reduce transaction costs. They explore how parents naturally form trust and mutual support networks in public spaces like airports and playgrounds to watch over children and manage safety.
↗ 1:00:09 – 1:06:13Kathrine Starkweather, Dave Pietraszewski, and David Pinsof examine fatherhood dynamics among the Tsimane/Shotogore families and in modern society, highlighting strong cultural norms around attentive dads. They also discuss shifting personal attitudes toward parenting behavior, empathy for tired parents, and pitfalls in evolutionary research regarding male and female behavioral variability.
↗ 1:06:13 – 1:12:15Host Dave Pietraszewski, David Pinsof, and guest Kathrine Starkweather discuss the importance of studying within-sex variability among women rather than solely relying on male-female comparisons. They examine how natural selection operates on female reproductive success and how evolutionary theories must account for who truly benefits from specific behaviors like polyandry.
↗ 1:12:15 – 1:17:19