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I have suggested in the past that inter-population differences in height may be a function of expected levels of nutritional stress. The same dynamic could produce variation in height within populations as well.But a new paper outlines what I think I think is the most elegant solution (though elegant does not mean right!In relation to nationality I'm a American Northwesterner, in politics I'm a reactionary, and as for religion I have none (I'm an atheist).

It’s easy to imagine why being tall might entail fitness gains for a male. I suspect that on the extreme margin very tall women probably have lower fertility for hormonal reasons.Also, families there doesn’t seem to be a correlation between height and intelligence, which you would expect to see if quantitative traits are reflections of variation in mutational load.So naturally you have to move the possibility of balancing selection.), Intralocus sexual conflict over human height: Intralocus sexual conflict (IASC) occurs when a trait under selection in one sex constrains the other sex from achieving its sex-specific fitness optimum.Selection pressures on body size often differ between the sexes across many species, including humans: among men individuals of average height enjoy the highest reproductive success, while shorter women have the highest reproductive success.This blog is about evolution, genetics, genomics and their interstices.

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