David Michael Buss (born April 14, 1953) is an American evolutionary psychologist at the University of Texas at Austin, researching human sex differences in mate selection. He is considered one of the founders of evolutionary psychology. Buss earned his PhD in psychology at University of California, Berkeley in 1981. Before becoming a professor at the University of Texas, he was assistant professor for four years at Harvard University and a professor at the University of Michigan for eleven years. The primary topics of his research include male mating strategies, conflict between the sexes, social status, social reputation, prestige, the emotion of jealousy, homicide, anti-homicide defenses, and—most recently—stalking. All of these are approached from an evolutionary perspective. Buss is the author of more than 200 scientific articles and has won many awards, including an APA Distinguished Scientific Award for Early Career Contribution to Psychology in 1988 and an APA G. Stanley Hall Lectureship in 1990. He is also the author of Evolutionary Psychology: The New Science of the Mind, whose fourth edition was released in 2011. In 2005, Buss edited a reference volume, The Handbook of Evolutionary Psychology. His latest book is When Men Behave Badly: The Hidden Roots of Sexual Deception, Harassment, and Assault. Buss is involved with extensive cross-cultural research collaborations and lectures within the U.S.