Behavioral and Brain Sciences

Author's Response
David C. Geary (1996). Sexual selection and sex differences in mathematical abilities. BBS 19:229–84.

Sexual selection, the division of labor, and the evolution of sex differences

David C. Geary a1
a1 Department of Psychology, University of Missouri, Columbia, MO 65211-2500


Sexual selection traditionally involves male-male competition and female choice, but in some species, including humans, sexual selection can also involve female-female competition and male choice. The degree to which one aspect of sexual selection or another is manifest in human populations will be influenced by a host of social and ecological variables, including the operational sex ratio. These variables are discussed in connection with the relative contribution of sexual selection and the division of labor to the evolution of human sex differences.