Norway dating introduction
The Protestant Reformation reformulated marriage as a life-long covenant.
Marriage of some kind is found in most societies, and typically married people form a nuclear household, which is often subsequently extended biologically, through children. Most non-Western societies have a broader definition of family that includes an extended family network.
The Christian West formally banned these practices.
Globally, most existing societies no longer allow polygamy as a form of marriage.
In modern times, the term marriage is generally reserved for a union that is formally recognized by the state (although some people disagree).