Jointly sponsored by the Institute for Mind and Biology and the Department of Comparative Human Development, this workshop brings together individuals broadly interested in how biology and environment influence social behavior and how behavior in turn influences evolutionary change. Our speakers and participants conduct research on how developmental, physiological, and cognitive mechanisms influence animal and human behavior, how these mechanisms evolve by natural selection, and how behavior contributes to an individual’s adaptation to the environment. Topics include aggressive and affiliative behavior, sex, mating and parenting, social development, kin selection, and immunological and hormonal correlates of behavior. Graduate students interested in any biological and social aspects of behavior are encouraged to attend this open forum.