3 Marriage and Alliance

Marriage and social relationships

Marriage is a socially recognized union that establishes relationships, rights, and responsibilities between spouses and often between their relatives. Its meaning and rules vary across societies. Marriage may organize care for children, household labor, property, and inheritance, and it may create ties among families and larger groups. It does not always involve biological children or take the same form everywhere.

Rules for choosing a spouse

Societies shape partner choice through rules and preferences. Endogamy favors or requires marrying within a defined group, such as a religious community, caste, or social category. Exogamy favors or requires marrying outside a defined group, such as one’s clan. Both rules may apply to the same person: for example, someone may be expected to marry outside their clan but within their religious community.

Incest prohibitions also restrict marriage or sexual relations with certain close relatives, although the boundaries differ among cultures. Partner choice may be led primarily by the individuals, their families, or a matchmaker; these arrangements are not necessarily opposites. A family may introduce or negotiate a match while the prospective spouses participate in the decision.

Marriage preferences and restrictions can help maintain group boundaries, property, or social ties, but they may also change over time.

Forms of marriage

A marriage may be monogamous, involving two spouses, or plural, involving more than two. Polygyny is a form in which a man has multiple wives; polyandry is a form in which a woman has multiple husbands.

The existence of a form does not mean that everyone in a society practices it. Economic conditions, law, and personal circumstances can affect who marries and how households are organized. Marital unions may also differ in how they are recognized and in the obligations they establish.

Residence after marriage

Postmarital residence rules describe where a couple lives in relation to their relatives. These terms refer to social patterns, not simply to who owns a house:

• Patrilocal residence places the couple with or near the husband’s relatives.

• Matrilocal residence places them with or near the wife’s relatives.

• Neolocal residence establishes a household apart from both families.

• Bilocal residence allows a choice between living with or near either spouse’s family.

• Avunculocal residence places the couple with or near the husband’s maternal uncle.

Residence can shape daily support, labor, inheritance, and children’s connections to kin. A couple living near the wife’s family may receive help from her relatives, while a patrilocal arrangement may embed the household in the husband’s kin group. Actual practice can be flexible, and residence patterns may change over a family’s life.

Marriage exchange and shared resources

Marriage may involve transfers of money, goods, or labor between families. Bridewealth is wealth transferred from the groom or his relatives to the bride’s relatives. Bride service is labor performed by the groom for the bride’s relatives, before or after the marriage. Dowry is wealth transferred from the bride’s family, often to the bride or the new couple.

The form, timing, ownership, and meaning of these transfers vary. They may help establish a new household, express respect, support a spouse, or formalize obligations between kin. Marriage exchange should not be reduced to a simple purchase of a spouse: it is embedded in local ideas about property, status, gender, and family responsibility.

Marriage as alliance

Marriage links spouses’ relatives through affinity, or kinship created by marriage, as well as connecting the spouses themselves. A union can create enduring relationships involving cooperation, mutual support, shared work, and obligations toward children.

Marriage exchange and residence rules can make these connections especially visible: families may contribute resources or labor, and the couple’s residence may connect them closely to one side of the kin network. For example, if a couple settles near one spouse’s relatives and receives help caring for a child, that arrangement can strengthen ties between the household and those relatives.

Marriage can therefore connect more than two individuals; it can link households and groups. Its rules shape how those ties are maintained. These alliances may be socially, economically, or politically important, but their consequences depend on the particular society and relationship.

How marriage connects families

Marriage rules guide whom people may or are expected to marry, while marriage forms and residence patterns organize household life and relationships with kin. Exchanges of goods, money, or labor can mark responsibilities between families. Through these practices, marriage creates alliances connecting spouses with their wider social networks.