That's familial IQ - heritability. Not average population IQ used to compare different populations. But not in other places. Know what is? Leaded gasoline exposure in childhood. As both cause and effect, historically within but not between populations. Those aren't my assertions. I did, and posted you the links. Two or three times now. Why haven't you read them? The conclusion drawn by the people who actually made these comparisons, carefully and scientifically, over the entire planet and as much historical and paleontological record as they could find, were that with very few and rare exceptions all races and nations of human beings have about the same genetic height. Which means IQ and height are strongly correlated. Also IQ and number of teeth. Should a person with a mental height of 5'2" or a mental tooth count of 28 be allowed to vote? Which, if you read it, not only omits the later research by John Komlos et al I linked - which compares height between populations, as your article does not - but also contains a direct warning to you about heritability measures like these: they vary considerably between different populations. You can't use them to compare the absolute values of the inherited feature between different populations. Seriously, dude: take a community college class in basic statistics. You're making a fool of yourself. As far as IQ and government, I'm in basic agreement with William Buckley: I would rather be governed by an equivalently numerous group of people selected at random from the registered voters of New York than by the faculty of Yale .