Two approaches: by structure: marital, genetic connection, or adoption, by functional: economic, emotional support, sexuality, childbearing and rearing, daily care etc. Household: people who occupy the same dwelling, and may consist of more than one families (one family can have more than one households as well) Monogamy: one person marries to only one person at a time. Polygamy: one person marries to several others of the opposite sex: polygyny: a man who has two or more wives at the same time (-> more common, polyandry: one woman is married to several men. The standard north american family (snaf: mother, father, their biological children, gendered division of labor and best unit for rearing children. Structural-functional theory (macro-level: functions: physical protection, emotional support, socialization, structure: organized around three statues and roles = husband/father, wife/mother, children, gendered role expectation: husband = task leader / wife = emotional leader, strengths. how the family is related to other institutions.