How've I never heard of Trivers Willard hypothesis before? It predicts good-condition parents favor sons, cause good-condition sons reproduce way more than good-condition daughters, and there's less variance between high and low condition daughters.
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It's a fascinating and compelling idea, but evidence for it in humans has been elusive and quite mixed....
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Matt ridleys ‘red queen’ covers it too. It cited rich families as having around a 2:1 prevalence of males. I think the prevalence in presidential families for sons has been diminished after bush, clinton, and obama, since the time of publication.
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well. Trivers Willard. Ok. But Im a good-conditioned guy who is cool with good or bad conditioned offspring. So, wanna go for a drink?
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