In human context, a family is a group of people affiliated by consanguinity, affinity, or co-residence. In most societies it is the principal institution for the socialization of children. Anthropologists most generally classify family organization as matrilocal (a mother and her children); conjugal (a husband, his wife, and children; also called nuclear family); and consanguineal (also called an extended family) in which parents and children co-reside with other members of one parent’s family.