The institution of family has three important functions:
In Western societies, we tend to think of a family as consisting of a mother, father, and children living under one roof: a nuclear family. Before societies modernize, families usually consist of several generations and branches of extended family living in the same dwelling, or in the same village. As modernization occurs, young people tend to move away from the villages in which they were raised in search of jobs, leaving the older generations behind. They relocate to cities and meet people they probably never would have met had they stayed home. People in modernized, urbanized societies meet spouses on their own, rather than being introduced by family members, and marry and settle down in locations that are often far from their original communities.
Marriage, a foundation of family life, exists in all cultures, with some variations:
In some cultures, after marriage, a couple lives in the wife’s family’s household—a practice called matrilocality. When couples live in the husband’s family’s household, the practice is called patriolocality. If they go out and get their own place to live, they practice neolocality.