Timothy A. Kohler is Regent's Professor in the Department of Anthropology@Washington State University and an external professor@the Santa Fe Institute. He earned a Ph.D. in anthropology from the University of Florida, and he studies Neolithic societies around the world and the application of evolutionary logic to understanding change in human societies. Address: Department of Anthropology, P.O. Box 644910, Washington State University, Pullman, WA 99164-4910. Internet: tako@wsu.edu