Another school argues that the incest prohibition is a cultural construct which arises as a side effect of a general human preference for group exogamy , which arises because intermarriage between groups construct valuable alliances that improve the ability for both groups to thrive.
Ambilineality Unilineality Matrilineality Patrilineality.
The shocking revelations of people who commit incest
Social Bonding and Nurture Kinship.
Some anthropologists argue that nuclear family incest avoidance can be explained in terms of the ecological, demographic, and economic benefits of exogamy.
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