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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.

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Ambilineality Unilineality Matrilineality Patrilineality.

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The shocking revelations of people who commit incest

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Social Bonding and Nurture Kinship.

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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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