Barrett, H. Clark, Alex Bolyanatz, Alyssa N. Crittenden, Daniel M.T. Fessler, Simon Fitzpatrick, Michael Gurven, Joseph Henrich, et al.Small-Scale Societies Exhibit Fundamental Variation in the Role of Intentions in Moral Judgment.” Proceedings of the National Academy of Sciences of the United States 133, no. 17 (2016): 4688–4693. Online Version with Supplemental Materials
Purzycki, Benjamin Grant, Coren Apicella, Quentin D. Atkinson, Emma Cohen, Rita Anne McNamara, Aiyana K. Willard, Dimitris Xygalatas, Ara Norenzayan, and Joseph Henrich. “Moralistic gods, supernatural punishment and the expansion of human sociality.” Nature 530, no. 7590 (2016): 327–330. Online Version with Supplementary Materials
Moya, Cristina, and Joseph Henrich. “Culture–gene coevolutionary psychology: cultural learning, language, and ethnic psychology.” Current Opinion in Psychology 8 (2016): 112-118. PDF
Henrich, J., and R. Boyd. “How evolved psychological mechanisms empower cultural group selection.” Behavioral and Brain Sciences 39 (2016): doi: 10.1017/S0140525X15000138. Online Version PDF
Broesch, T., P. Rochat, K. Olah, J. Broesch, and J. Henrich. “Similarities and differences in maternal responsiveness in three societies: Evidence from Fiji, Kenya and US.” Child Development 87, no. 3 (2016): 700-11. Full Online Version PDF
Norenzayan, A., A. F. Shariff, W. M. Gervais, A. Willard, R. McNamara, E. Slingerland, and J. Henrich. “The Cultural Evolution of Prosocial Religions.” Behavioral and Brain Sciences 39 (2016): 1-19. Online Version
McNamara, Rita Anne, Ara Norenzayan, and Joseph Henrich. “Supernatural punishment, in-group biases, and material insecurity: Experiments and Ethnography from Yasawa, Fiji.” Religion, Brain & Behavior 6, no. 1 (2016): 34-55. Online Version PDF
Muthukrishna, Michael, Thomas Joshua Henry Morgan, and Joseph Henrich. “The When and Who of Social Learning and Conformist Transmission.” Evolution and Human Behavior 37, no. 1 (2016): 10-20. PDF
Hruschka, D., and J Henrich. “Prosocial Behavior, Cultural Differences in.” In International Encyclopedia of the Social & Behavioral Sciences, 238-243. 2nd ed. Elsevier, 2015. Publisher's Version
Henrich, Joseph, Maciej Chudek, and Robert Boyd. “The Big Man Mechanism: how prestige fosters cooperation and creates prosocial leaders.” Philosophical Transactions of the Royal Society B 370, no. 1683 (2015). Publisher's Version PDF
Henrich, J.Culture and social behavior.” Current Opinion in Behavioral Sciences 3 (2015): 84-89. PDF
Fessler, D. M. T., H. C. Barret, M. Kanovsky, S. Stich, C. Holbrook, J. Henrich, A. H. Bolyanatz, et al.Moral parochialism and contextual contingency across seven societies.” Proceedings of the Royal Society B 282 (2015): 20150907. Online Access PDF
McKerracher, L., M. Collard, and J. Henrich. “The expression and adaptive significance of pregnancy-related nausea, vomiting, and aversions on Yasawa Island, Fiji.” Evolution and Human Behavior 36, no. 2 (2015): 95-102. PDF
The Secret of Our Success: How culture is driving human evolution, domesticating our species, and making us smart
Henrich, Joseph. The Secret of Our Success: How culture is driving human evolution, domesticating our species, and making us smart. Princeton, NJ: Princeton University Press, 2015. Publisher's VersionAbstract

Humans are a puzzling species. On the one hand, we struggle to survive on our own in the wild, often unable to solve basic problems, like obtaining food, building shelters or avoiding predators. On the other hand, human groups have produced innovative technologies, sophisticated languages, and complex institutions that have permitted us to successfully expand into environments across the globe. What has enabled us to dominate such a vast range of environments, more than any other species? The Secret of Our Success lies not in our innate intelligence, but in our collective brains—in the ability of human groups to socially interconnect and to learn from one another.

Drawing insights from lost European explorers, clever chimpanzees, hunter-gatherers, neuroscientists, ancient bones, and the human genome, Joseph Henrich demonstrates how our collective brains have propelled our species’ genetic evolution, and shaped our biology. Our early capacities for learning from others produced many innovations, such as fire, cooking, water containers, plant knowledge and projectile weapons, which in turn drove the expansion of our brains and altered our physiology, anatomy and psychology in crucial ways. Further on, some collective brains generated and recombined powerful concepts, such as the lever, wheel, screw and writing. Henrich shows how our genetics and biology are inextricably interwoven with cultural evolution, and that this unique culture-gene interaction has propelled our species on a unique evolutionary trajectory.

Tracking clues from our ancient past to the present, The Secret of Our Success explores how our cultural and social natures produce a collective intelligence that explains both our species striking uniqueness and odd peculiarities.

Visit the book website here.

Chudek, Maciej., Michael Muthukrishna, and Joseph Henrich. “Cultural Evolution.” In The Handbook of Evolutionary Psychology, edited by David M. Buss. Vol. 2. 2nd ed. John Wiley and Sons, 2015. PDF
Moya, C., R. Boyd, and J. Henrich. “Reasoning about cultural and genetic transmission: Developmental and cross-cultural evidence from Peru, Fiji, and the US on how people make inferences about trait and identity transmission.” Topics in Cognitive Science 7, no. 4 (2015): 595-610. PDF
Salali, Gul Deniz, Myriam Juda, and Joseph Henrich. “Transmission and development of costly punishment in children.” Evolution and Human Behavior 36 (2015): 86-94.Abstract

Evolutionary theorists argue that cultural evolution has harnessed various aspects of our evolved psychology to create a variety of different mechanisms for sustaining social norms, including those related to large-scale cooperation. One of these mechanisms, costly punishment, has emerged in experiments as an effective means to sustain cooperation in some societies. If this view is correct, individuals' willingness to engage in the costly punishment of norm violators should be culturally transmittable, and applicable to both prosocial and anti-social behaviors (to any social norm). Since much existing work shows that norm-based prosocial behavior in experiments develops substantially during early and middle childhood, we tested 245 3- to 8-year olds in a simplified third party punishment game to investigate whether children would imitate a model's decision to punish, at a personal cost, both unequal and equal offers. Our study showed that children, regardless of their age, imitate the costly punishment of both equal and unequal offers, and the rates of imitation increase (not decrease) with age. However, only older children imitate not-punishing for both equal and unequal offers. These findings highlight the potential role of cultural transmission in the stabilization or de-stabilization of costly punishment in a population.

Experimenting with Social Norms: Fairness and Punishment in Cross-Cultural Perspective
Ensminger, J., and J. Henrich, ed. Experimenting with Social Norms: Fairness and Punishment in Cross-Cultural Perspective. New York: Russell Sage Press, 2014. Publisher's VersionAbstract

Questions about the origins of human cooperation have long puzzled and divided scientists. Social norms that foster fair-minded behavior, altruism and collective action undergird the foundations of large-scale human societies, but we know little about how these norms develop or spread, or why the intensity and breadth of human cooperation varies among different populations. What is the connection between social norms that encourage fair dealing and economic growth? How are these social norms related to the emergence of centralized institutions? Informed by a pioneering set of cross-cultural data, Experimenting with Social Norms advances our understanding of the evolution of human cooperation and the expansion of complex societies.

Editors Jean Ensminger and Joseph Henrich present evidence from an exciting collaboration between anthropologists and economists. Using experimental economics games, researchers examined levels of fairness, cooperation, and norms for punishing those who violate expectations of equality across a diverse swath of societies, from hunter-gatherers in Tanzania to a small town in rural Missouri. These experiments tested individuals’ willingness to conduct mutually beneficial transactions with strangers that reap rewards only at the expense of taking a risk on the cooperation of others. The results show a robust relationship between exposure to market economies and social norms that benefit the group over narrow economic self-interest. Levels of fairness and generosity are generally higher among individuals in communities with more integrated markets. Religion also plays a powerful role. Individuals practicing either Islam or Christianity exhibited a stronger sense of fairness, possibly because religions with high moralizing deities, equipped with ample powers to reward and punish, encourage greater prosociality. The size of the settlement also had an impact. People in larger communities were more willing to punish unfairness compared to those in smaller societies. Taken together, the volume supports the hypothesis that social norms evolved over thousands of years to allow strangers in more complex and large settlements to coexist, trade and prosper.

Innovative and ambitious, Experimenting with Social Norms synthesizes an unprecedented analysis of social behavior from an immense range of human societies. The fifteen case studies analyzed in this volume, which include field experiments in Africa, South America, New Guinea, Siberia and the United States, are available for free download on the Foundation’s website.

Henrich, J., and J. Ensminger. “Chapter 2: Theoretical Foundations—The Coevolution of Social Norms, Intrinsic Motivation, Markets, and the Institutions of Complex Societies.” In In Experimenting with Social Norms: Fairness and Punishment in Cross-Cultural Perspective, edited by J. Ensminger and J. Henrich. New York: Russell Sage Press, 2014.
Henrich, J., and J. Ensminger. “Chapter 3: Cross-Cultural Experimental Methods, Sites, and Variables.” In Experimenting with Social Norms: Fairness and Punishment in Cross-Cultural Perspective. edited by J. Ensminger and J. Henrich. New York: Russell Sage Press, 2014.