What is the definition of family?

Definition of family: "Family is based on family and refers to the descendants of the same male ancestor. Although they have separated and formed many individual families, they still get together from generation to generation (for example, * * * lives in a village) and are combined by blood relationship according to certain norms, becoming a special form of social organization. To form a family, first, it must be the descendants of male ancestors, and the blood relationship from the male line is clear; Secondly, there must be certain norms and methods as the criteria for dealing with ethnic relations; Third, there must be a certain organizational system, such as the patriarch, to lead the clan to carry out family activities and manage public affairs within the clan. No matter which historical stage or specific form of family organization, these three basic characteristics are indispensable.