Humm. Complicated subject. I would find a study of Nordic Countries facinating. They went from rape and pillage throughout europe in the middle ages to peaceful prosperous countries. Same with the Germans and Japanese in modern times.
I understand gun control advocates position, having lived in US suburbia for many years...but I also understand the pro-gun community now that I live in rural america where one county is the size of a small european country...with only one deputy 30 minutes away..with Biker gangs and Mexican Cartel members growing pot, and cooking crank in the nearby hills.