I was getting ready to go on a rant about how unfortunate it is that so much more money and effort is spent on what you might call aggressive tactics (guns, gre

I was getting ready to go on a rant about how unfortunate it is that so much more money and effort is spent on what you might call aggressive tactics (guns, grenades, gas) versus peaceful resolution tactics (negotiation skills, psychology training, de-escalation techniques). Then I realized that I actually don't know what the relative proportions are. Does anyone know where to find that out?