[cdirkx]

> assuming it's because men took on some dangerous role that women didn't (war, hunting, etc.)

One possible hypothesis is that polygamy itself is the cause of this: the higher competition for wives drives the men to extremer forms of acquiring status (war, hunting, etc).

[ryanackley]

I'm skeptical, the indigenous chief who is the subject of the article makes it very clear he wished he only had one wife but he can't get rid of the other two. One of the premises of the article is that polygamy was probably not a form of sex slavery but rather a social necessity.