Lee Cronk is a professor of anthropology at Rutgers University in New Brunswick, New Jersey. He received his Ph.D. from Northwestern University in 1989. His first book, That Complex Whole: Culture and the Evolution of Human Behavior, explored the possibility of developing an approach to the study of human behavior that incorporates both evolutionary theory and the concept of culture. Long-term fieldwork in Kenya led to his second book, From Mukogodo to Maasai: Ethnicity and Cultural Change in Kenya. It explores the past, present, and future of ethnic identity among the Mukogodo, a small group of Maasai-speaking pastoralists. Cronk's latest book, co-authored with political scientist Beth L. Leech, is titled Meeting at Grand Central: Understanding the Social and Evolutionary Roots of Cooperation, and was recently published by Princeton University Press. He has also co-edited two volumes. Adaptation and Human Behavior: An Anthropological Perspective, co-edited with William Irons and Napoleon Chagnon, is a collection of theoretical and empirical chapters by leading figures in the field of human behavioral ecology. Through the Looking Glass: Readings in Anthropology, co-edited with Vaughn M. Bryant, Jr., is designed for use in introductory anthropology classes. He has also published articles in American Anthropologist, Current Anthropology, Evolution and Human Behavior, Human Nature, Journal of Evolutionary Psychology, Ethnology, Human Ecology, PLOS One, and other journals. In addition, Cronk is currently co-director, with C. Athena Aktipis, of the Human Generosity Project (humangenerosity.org).