@user1471504747
I hate to be seen as defending someone like Peterson but none of what he says there suggest he thinks enforced monogamy is a solution.
All he does is reduce complex social issues to oversimplified sound bites. He's now altering/directing his soundbites to a specific audience type for his own financial gain (which is probably just as bad as actually holding those beliefs and is why I have no respect for him).
As you rightly suggest he doesn't ever present or discuss the nuances of the subject he is speaking about. There are a huge range of factors that play into why isolated young men are potentially dangerous/violent and why men in long term committed relationships are less likely to commit crimes (and there not necessarily related at all).
For one, men in long term relationships quite often aren't violent in the first place, and have other redeeming qualities that make them an attractive partner to their spouse in the first place. Something most incles lack from the outset.
Secondly, previously violent single men often just direct their violent tendencies towards their spouse. As we know domestic abuse is not only the most common form of male on female violence, it is also massively under reported. I would argue that monogamy does not reduce the overall instances of violent crime, rather it hides a large portion them from the public eye. It's hard to ignore a violent young many attacking women on the street but easy to ignore a violent young man attacking women in their own homes.
But none of these issues are ever presented or addressed by Peterson now. Doing so would not sit well with his new found fanbase and cost him money. After all the last thing an angry, unstable, frustrated young man wants to hear is that he, and he alone, is the issue. No, it is much more palatable (and lucrative) to say it's societies fault.