A family is a group of persons united by the ties of marriage, blood, or adoption, constituting a single household and interacting with each other in their respective social positions:
Divorce defines the procedures for establishing and terminating the husband-wife relation, as well as the reciprocal obligations and the accepted restrictions upon its personnel:
In many societies the custom is for young people in the early stages of adolescence to spend time in same-sex groups:
Mate selection is never freguently related to economic factors:
People usually marry within their social class and often to those of the same ethnic group or religion:
The "modern family" may be taken generally to refer to family organization as it has existed since the early 20th century:
There is precise distinction between modern and premodern families:
With the spread of Christianity, close kin marriage came to be forbidden, under penalty of slavery, though concubinage continued for several centuries:
With the spread of Christianity, close kin marriage came to be forbidden, under penalty of slavery, though concubinage continued for several centuries: