The author examines the impact of colonialism and the cash economy on the Nandi, a semi-pastoral and patrilineal people of western Kenya, emphasizing changes in women's and men's economic roles and their respective relations to property and to each other. Since the sex roles associated with production and property relations are linked to sex roles in other areas - in the marriage system, husband-wife relations, kinship, cultural ideals of male and female, ritual relations, participation in community affairs - these areas are also analyzed. The author asks whether the changes in Nandi society...