While polygyny may benefit the men involved, it denies wives to other men, especially young, low-status men, who, like all men, tend to measure their success by their manhood, that is, by the twin parameters of social status and fertility. With little to lose or look forward to, these frustrated men are much more likely to turn to crime and violence, including sexual violence and warmongering. It is perhaps telling that polygamy is practiced in almost all of the 20 most unstable countries on the Fragile States Index.
