William D. Lassek & Steven J.C. Gaulin

William D. Lassek, M.D., is a former assistant surgeon general and currently assistant professor in the Department of Epidemiology at the Graduate School of Public Health at the University of Pittsburgh.

Steven J.C. Gaulin, PH.D., is professor of anthropology at the University of California at Santa Barbara and the editor in chief of Evolution and Human Behavior, the leading scientific journal studying evolution, anthropology, and psychology.