Wives the foundation of Civilization

I recently read an article on Islamic polygamy, and one of the commentators to the article had this to say, which I found interesting:

Car insurance companies hire statisticians. Those statisticians have found that indeed, young men are reckless. They have also found that once those young men are married, literally, "settled down" they become less reckless as now they must be providers. In general, wives keep their husbands in line and out of trouble.

What does polygamy do? Imagine a population of 50 men and 50 women. Where each man will take 2 wives if he can. Well, you will potentially have 25 men with 2 wives apiece, and 25 single men. And those 25 single men will be society's worst nightmare: reckless, criminal, irresponsible.

Monogamy is the foundation of modern civilization. A wife to control all men, a father to control all children. Children without fathers and men without wives, will be the downfall of any civilization.