Publications and Presentations

Human Generosity Project members publish in academic journals and other media and present their work at academic conventions.


Aktipis, C. A., De Aguilar, R., Flaherty, A., Iyer, P., Sonkoi, D., Cronk, L. (In press). Cooperation in an uncertain world: For the Maasai of East Africa need-based transfers outperform account keeping in volatile environments. Human Ecology.Aktipis et al Human Ecology 2016

Cronk, Lee, and C. Athena Aktipis. In press. Sacredness as an implied threat of supernatural punishment: The case of need-based transfers. Religion, Brain, and Behavior.

Aktipis, A. (2016). Principles of cooperation across systems: from human sharing to multicellularity and cancer. Evolutionary Applications, 9:17–36. DOI: 10.1111/eva.1230

Gervais, M. M. (2016). RICH Economic Games for Networked Relationships and Communities: Development and Preliminary Validation in Yasawa, Fiji. Field Methods. DOI: 10.1177/1525822X16643709.Gervais Economic Games Fiji

Cronk, Lee. (2015). Human cooperation: Evolutionary approaches to a complex phenomenon. Handbook on Evolution and Society: Toward an Evolutionary Social Science, edited by Jonathan Turner, Richard Machalek, and Alexandra Maryanski, pp. 441-459. St. Paul, MN: Paradigm Publishing.Cronk Human Cooperation

Cronk, Lee, and C. Athena Aktipis. 2015. The Human Generosity Project. Anthropology News, July/August 2015, pages 31-32.Anthropology News 2015

Hao, Y., Cronk L., Armbruster, D., Aktipis, C.A. (2014). Need-based transfers on a network: A model of risk-pooling in ecologically volatile environments. Evolution and Human Behavior.Hao et al 2015

Cronk, Lee, and Beth L. Leech. (2013). Meeting at Grand Central: Understanding the Social and Evolutionary Roots of Cooperation. Princeton, NJ: Princeton University Press.

Gazzillo, Steven, Barry Sopher, C. Athena Aktipis, and Lee Cronk. (2013). The origins of risk sharing: An experimental approach. Working Paper No. 2013-02, Department of Economics, Rutgers University, New Brunswick, NJ.gazzillo et al 2013

Aktipis, C. A., Cronk, L., De Aguilar, R. (2011). Risk-pooling and herd survival: An agent-based model of a Maasai gift-giving system. Human Ecology 39(2) 131-140.aktipis et al Human Ecology

Cronk, Lee, and Helen Wasielewski. (2008). An unfamiliar social norm rapidly produces framing effects in an economic game. Journal of Evolutionary Psychology 6(4):283-308.Cronk & Wasielewski 2008

Cronk, Lee. (2007). The influence of cultural framing on play in the trust game: A Maasai example. Evolution and Human Behavior 28:352-358.cronk on osotua, EHB 2007



2016 Meeting of the Human Behavior and Evolution Society

Wasielewski, Maldonado, Alcock, Mandel, Krajmalnik-Brown, & Aktipis: Evolutionary Dynamics of the Human Oral Microbiome.
Wasielewski HBES 2016

Campenni, Cronk, & Aktipis: Survival and resilience varying the correlation of shocks.

Iyer: The role of livestock transfer relationships in risk management among pastoralists in Karamoja, Uganda.

2015 Meeting of the Human Behavior and Evolution Society

Lenfesty, Aktipis, & Cronk: “Spiritual Kinship”, Need-Based Transfers, and the Evolution of Cooperation

Campenni, Cronk, & Aktipis: Need-based transfers and account-keeping in social networks: How do alternatve cooperatve strategies scale-up?

Cronk, Gervais, & Aktipis: Generous by nature: Risk, need, and the evolution of human cooperation.

Chang, Cronk, & Aktipis: Cheater detection in need-based transfer systems.

Gervais: The relational contexts of generosity in a Fijian social network.