David P. Barash is professor of psychology and zoology at the University of Washington in Seattle. He has been active in the growth of sociobiology as a scientific discipline. He is the author of more than 170 technical articles and twenty books including "Sociobiology and Behavior, Aging: An Exploration, Beloved Enemies: Exploring Our Need for Opponents, Making Sense of Sex: How Genes and Gender Influence Our Relationships" (with Judith E. Lipton), and "The Mammal in the Mirror: Understanding Our Place in the Natural World" (with Ilona A. Barash).).