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People hallucinate these strange ideas because they cannot let go of zero-sum genes / environments ideas. That stuff (and related "nature/nurture" nonsense) is like weeds, keeps coming back. See Intro to @GadSaad's Consuming Instinct, see Tooby & Cosmides passim...
... but thinking in terms of nature and culture seems so entrenched that it will take many books to uproot that tenacious weed. Unfortunately that way of thinking is highly intuitive as well as awfully misguided.
