| 11. | :: I do think the origin of the incest taboo is that incest leads to inbreeding.
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| 12. | An incest taboo against relations between parent and child or two full-blooded siblings is a cultural universal.
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| 13. | The purpose of the totemic animal is not for group unity, but to re-enforce the incest taboo.
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| 14. | Incest taboos, though varied, exist in most all cultures, as the Incest article here will show you.
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| 15. | One objection against an instinctive and genetic basis for the incest taboo is that incest does occur.
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| 16. | For example, the incest taboo, if powerfully enforced, removes the natural selection pressure against the possession of incest-favoring instincts.
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| 17. | :: : : : : Note that the incest taboo is one which exists in many other species, as well.
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| 18. | "The mating system among humans requires 250 to 400 people so as not to cross the incest taboo, " he said.
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| 19. | This kinship detection system in turn affects other genetic predispositions such as the incest taboo and a tendency for altruism towards relatives.
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| 20. | Some cultures extend the incest taboo to relatives with no consanguinity such as illegitimate, and are still so regarded in some societies today.
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