Historically, polygamy has been practiced as polygyny (one man having more than one wife), as polyandry (one woman having more than one husband), or, less commonly, as "polygamy" (having many wives and many husbands at one time).
Further, many people practice polyamory, which refers to the acceptance, desire, and experience of more than one intimate relationship at a time with the consent of all involved (note this differs from polygamy, which refers to multiple spouses rather than relationships and which historically, religiously, and culturally does not necessarily require the consent of all parties involved).
An example of a strictly endogamous religious group is the Yazidi in Northern Iraq, who prohibit any inter-clan marrying.
Endogamy is a common practice among displaced cultures attempting to make roots in new countries as it encourages group solidarity and ensures greater control over group resources (which may be important to preserve where a group is attempting to establish itself within an alien culture).
This notion of parents and children as family is called a nuclear family and is a recent invention of the Western World that has (in some cases) been sold as a form of "tradition." It is a social construct that does not necessarily reflect the reality of family life for many people. S., the nuclear family is no longer the primary form of social life in the U. According to recent census data, more adult women now live alone or are raising their children alone than are living with a spouse or raising their children with a spouse.
The structure of families traditionally hinges on relations between parents and children, between spouses, between members of long term relationships (romantic, economic or otherwise) or all of the above.
But society increasingly accepts a number of variations on family forms.
Sipping my coffee, I nodded and asked, “What happened this time?
You can see a good example of the changing nature of families in the family structure of Ancient Rome.
In Ancient Rome the family structure was centered on the father (see paterfamilias).
The development of horticultural or agriculture-based societies fundamentally changed the nature of marriage and family forms built around it.
With the advent of sedentary societies, marriage became one of the central institutions for forging economic and political relationships and was no longer viewed, at least among the aristocracy, as a relationship that should be based on love, companionship, or sexual attraction.