Michael E. Whalen is a professor emeritus in the department of anthropology at the University of Tulsa. His research interests include complex societies, processes of sociocultural evolution, prehistoric social structure, and ceramic analysis.Paul E. Minnis is a professor emeritus of anthropology at the University of Oklahoma now living in Tucson, Arizona, where he is a visiting scholar in the School of Anthropology at the University of Arizona. He is the author or editor of fifteen books, including Famine Foods: Plants We Eat to Survive, and numerous articles.