Dr. Bernard Crespi's research program uses integrated genetic, ecological and phylogenetic approaches to study social evolution across all levels in the hierarchy of life, from genes, to cells, to organisms, to social systems, and to the brain. He currently focuses on several of the outstanding questions in evolutionary biology, including the evolution of social behavior, the evolution of human health and disease, the evolution of placentation and maternal-fetal conflict, the evolution of trophic interactions, and the roles of genetics, ecology and geography in speciation and adaptive radiation.