What is marriage? Not even sociologists are able to agree on a single meaning. For our purposes, we’ll define marriage as a legally recognized social contract between two people, traditionally based on a sexual relationship and implying a permanence of the union. In practicing cultural relativism, we should also consider variations, such as whether a legal union is required, whether more than two people can be involved, or whether the marriage is a religious one or a civil one.
Sociologists are interested in the relationship between the institution of marriage and the institution of family because, historically, marriages are what create a family, and families are the most basic social unit upon which society is built. Both marriage and family create status roles that are sanctioned by society.
The question of what constitutes a family may be an even more difficult one to answer; it’s a prime area of debate in family sociology, as well as in politics and religion. Social conservatives tend to define the family in terms of structure with each family member filling a certain role (like father, mother, or child). Sociologists, on the other hand, tend to define family more in terms of the manner in which members relate to one another than on a strict configuration of status roles. Here, we’ll define family as a socially recognized group (usually joined by blood, marriage, cohabitation, or adoption) that forms an emotional connection and serves as an economic unit of society. Sociologists identify different types of families based on how one enters into them. A family of orientation refers to the family into which a person is born. A family of procreation describes one that is formed through marriage. These distinctions have cultural significance related to issues of lineage.