Family is in sociology, a group of individuals united by kinship. This relationship is hereditary, but can also extend to legal situations, such as marriage, partnership or adoption.
Many argue that the concept of family is limited to blood ties, while some anthropologists argue that blood ties only to be understood metaphorically, as in many cultures are criteria other than genetic ties that define family relationships. Today the term is used also in a wider context of close friends or perhaps to intrinsic. In public housing is often talk about “big family”.