Regents’ Professor Emeritus in the School of Human Evolution & Social Change at Arizona State University. He is the author, co-author or editor of over 300 articles, notes, reviews and comments, and 12 monographs and books on human biological and cultural evolution in ‘deep time’ - the past four million years. A University of Chicago Ph.D. (1971), his current interests turn on the logic of inference underlying knowledge claims in the various aspects of modern human origins research and with applications of neo-Darwinian evolutionary theory in archaeology. Clark has done fieldwork in Arizona, France, Spain, Cyprus, Turkey, Sudan and Jordan. Other research foci include European Mesolithic forager adaptations and the peopling of the Americas. Clark has headed the Archeology Division of the American Anthropological Association (AAA) and Anthropology Section H of the American Association for the Advancement of Science (AAAS). He lectures on race, racism and ethnic conflict; the evolution of human mating, the conflict between religion and science, human evolution, and modern human origins. A materialist to the core and a committed evolutionist, he has been concerned with the promotion of western science as a conceptual framework for describing and explaining the experiential world and with contesting the claims of the various anti- and pseudo-science constituencies arrayed against it.