This is well worth the watch. Very well done (although I wish he had linked his sources at the end) If I had put a presentation together, this is about what it would have looked like. He gets into ALL aspects of the issue, dealing statistically not just with gun ownership (30% lower homicide rates in Conceal Carry States; 42% less violent crime), but also social issues. He makes the excellent point that much of our violent crime traces to the perverse incentives created by our drug laws, which–just as happened in Prohibition–actually facilitate violence by literally making crime pay. Or the War on Poverty: if people married at 1970 rates, most urban poverty would disappear. 85% of prison inmates come from single parent homes.
The thing is logically coherent, fact filled, and lucid.
I am going to send it to a couple local school districts, and perhaps a few randomly chosen college professors. It is that good. I would encourage anyone reading this to post it on their Facebook, then email the link to a few people.