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Starting with the Minnesota twin study thirty-five years ago, and now with a mountain of data from twin, sibling, and adoption studies, we know that pretty much anything you can quantify about human personality, behavior, and intelligence is to some degree heritable, average-average at around the fifty percent level but sometimes much higher. We now in fact have a busy and exciting field of study called “behavioral genetics.” Given that all these traits are heritable, it follows from the ordinary laws of biology that different races will exhibit different statistical profiles on them. That’s not astonishing, mysterious, or horrible: It’s just first-floor-level science. (en) |
