I was reading Rollo's sidebar article about dual mating strategy. As he writes, women want a 'genetically good' partner to have kids with and a stable (beta) guy to take care of them.

Why wouldn't an alpha leader personality make the best provider? That is, someone who's confident and does well socially in the tribe etc would be able to take good care of the woman and her offspring. How much of that ' genetic fitness' is looks and how does personality play a part in it?