One distressing characteristic of the Left, at least as far as science is concerned, is to let our ideology trump scientific data; that is, some of us ignore biological data when it’s inimical to our political preferences. This plays out in several ways: the insistence that race doesn’t exist (and before you accuse me of saying that races do exist, read about what I’ve written here before: the issue is complex), that there are no evolutionarily-based innate (e.g., genetically based) behavioral or psychological differences between ethnic groups, and that there are no such differences, either, between males and females within humans.

These claims are based not on biological data, but on ideological fears of the Left: if we admit of such differences, it could foster racism and sexism.  Thus. any group differences we do observe, whether they reside in psychology, physiology, or morphology, are to be explained on first principle as resulting from culture rather than genes. (I do of course recognize that culture can interact with genes to produce behaviors.) This ideological blinkering leads to the conclusion that when we see a difference in performance between groups and genders, the obvious explanation is culture and oppression, and the remedy is equal outcomes rather than equal opportunities. Yet in areas like most sports, where everyone agrees that males are on average larger and stronger than females, it’s clear that the behavioral differences (i.e., performance) result from biological differences that are surely based on evolution (see below). In sports like track and field or judo, nobody would think of making males compete with females.

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