There’s an old saying that goes: “an idea so ridiculous only an academic could believe it.” It seems to apply frequently as more professors sink deeper into the quicksand of progressivism.

One academic who sees reality squarely, however, is Duke University’s John Staddon. He has just published a new book entitled Inevitable Differences: An Inquiry into Human Variation, and I review it today for the Martin Center.

Many academics, Staddon observes, are infatuated with “diversity,” but what they have........

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