“Racism is Sexism, and Racism is Rational, so Sexism is Rational.”
Men have the Y chromosomes, women don’t. Women have no particular reason to preserve particular Ys because they don’t have any. If we want to preserve ours or increase their frequency, we have to do it ourselves.
But we want to preserve or increase our other chromosomes too. That means monopolizing access to the women who share our Xs and other chromosomes, or the alleles on those chromosomes. That implies exercising some level of power, control, or authority, over them.
Put another way, women and men BOTH have an incentive to prefer mating in-group (creating offspring that share more of our genes.) But men have a STRONGER incentive to mate ingroup, and to prevent women from mating out-group, than vice versa, because we have a whole chromosome they don’t have, but they don’t have any chromosomes that we don’t have.
Of course nobody “knows” (or nobody did until recently) what…
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