Patriarchy is a social system in which positions of dominance and privilege are held by men. The term patriarchy is used both in anthropology to describe a family or clan controlled by the father or eldest male or group of males, and in feminist theory to describe a broader social structure in which men as a group dominate women and children.

A clan is a group of people united by actual or perceived kinship and descent. Even if lineage details are unknown, a clan may claim descent from a founding member or apical ancestor who serves as a symbol of the clan's unity. Clans, in indigenous societies, were not endogamous: their members could not marry one another.