In the 1990s, questions of sex roles and individual identity have taken a central position in intellectual debates. These eleven essays in history and anthropology offer a novel perspective on these debates by questioning the place of sexual dimorphism in culture and history. They propose a new role for the study of alternative sex and gender systems in cultural science, as a means of critiquing thinking that privileges standard male/female gender distinctions and rejects the natural basis of other forms of sexuality.