Daniel MacArthur of Genetic Future weighs in on the ongoing debate over the important of random genetic drift vs natural selection during human evolution [Genetic differences between human populations: more drift than selection?].
Daniel MacArthur seems to be a smart guy. Here's a teaser ....
I should emphasise that there's little doubt that at least some recent population-specific selection has occurred in humans (the signal around the lactase gene in Europeans is about as unambiguous as it gets) - but perhaps it has not been anywhere near as pervasive as some researchers (e.g. John Hawks) have argued.
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