Ask the Chinese.
The Chinese have had a one child rule for a while and the desire for male children has combined in a judgment that will show their folly for what it is in the judgment they are reaping now. Many female babies were aborted or killed in infancy.
There are too many men and not enough women. There are already reports of women being kidnapped and the bow wave of this problem has not even hit yet.
I have a good friend who speculates that part of the reason for Middle Eastern violence is sexual frustration. Sure, everybody is ticked off but it's always young men with too much testoterone that are usually dumb enough to blow themselves up. Middle age men just don't commit like that anymore. The whole dynamic of the angry youth is fueled, in no small part, by the fact that some of them cannot marry because some of the more well-to-do, who can provide for multiple wives, take them "off the market" so to speak.
Wives and families are a calming and moderating influence for young men. China is going to reap the whirlwind for their stupidity and sin and its coming pretty quickly. This factor, combined with their increasing stress on the oil in the Middle East, is reason for long term concern.