One of the fundamental problems in Muslim nations, particularly Arab nations seems to me to be polagamy. Well-off older men have numerous wives and concubines so there are no women available for the younger poor men. This seems to result in a large pool of young men who are ripe for recruitmant into war against perceived enemies. It seems that China is going to have a similar problem due to the governments attempts to stem population growth by allowing women to only have one child. One result of this policy was widespread abortion of female babies. In some regions in China there are 60 boys out of every 100 babies born, as opposed to the natural rate of about 51 boys. These boys are now reaching maturity. An explosion of some sort would seem to be likely. Countries tend to be warlike when they have an excess of men.