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 behaviors and the environment in turn influences genetic change. Presenters conduct research on how developmental, physiological, and immunological mechanisms influence organismal behavior, and how evolutionary processes promote these mechanisms. Our regular participants study human and nonhuman animals, researching paternal behaviors, mate choice, immunology and endocrinology, kin selections, and cognition, among other topics. Graduate students interested in any area of the biological and social aspects of behavior are encouraged to attend this open forum.