The often-perceptive folks at the Economist have uncovered a link between polygamy and violence. If you read it through, you can learn some stuff that you might now know --- I certainly didn't know it. Turns out that a lot of terrorist/paramilitary organizations recruit members by promising them access to women and/or access to the tools they will need to acquire women in explicitly polygamous societies. It also appears that young men are rendered more susceptible to participation in terrorist organizations if their personal circumstances deny them access to women.