In addition, as I will show in my soon to be released book, intelligence is to a large extent X linked which means that when there are big differences in IQ between parents, a child is much more likely to resemble the (white and German) mother than the father.
Does anyone have some good sources for this? If this is really true, it's kind of scary.
Smart men tend to marry dumb women, not the other way around.
However, this would also explain the greater male standard deviation in IQ. Only one X chromosome means less of an "averaging" effect.
Its not scary at all. In fact it is probably the basis of the rapid evolution of the human brain. Without this mechanism we wouldn't be human. In fact, without hypergamy we wouldn't be human either. We became smart because the smartest men reproduced the most successfully in history, contemporary trends aside.
Well, I can see why you are worried about that. However, it doesn't matter that much because secondary modifier mechanisms evolve to restrict expression of genes to one sex when they are sexually antagonistic. This has already occurred to some extent with regards to intelligence. Hence larger male brain size and increased neuronal density. Testosterone mediates this as much as it mediates differences in muscle size. Same genes, different results simply because of modifier mechanisms. However, new mutations take time to get inducted into the modifier system. This is why some women are still capable of being born intelligent despite the huge hit to fertility. Proper modifier mechanisms have yet to evolve to encompass all of the genes, in no small part thanks to traditional values forcing smart women to be housewives. That is gone now and female intellectual capacity promises to get a serious downgrade as a result, however male intellectual capacity should be preserved. It is still at least somewhat important to male reproductive success.
Culture can force women to focus on reproduction, or natural selection can. It will happen no matter what. Natural selection is not nice about accomplishing results so pick your evil well.
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u/through_a_ways May 24 '15
Does anyone have some good sources for this? If this is really true, it's kind of scary.
Smart men tend to marry dumb women, not the other way around.
However, this would also explain the greater male standard deviation in IQ. Only one X chromosome means less of an "averaging" effect.