The less power a person feels he has, the more likely he is to use force. This seems to me a constant within communities and across time.
Kids in ghettoes who feel like they have no options, no power to actually create a life that looks desirable are more likely to engage in violence, to use force. Primitive cultures that have little power to overcome the elements are more likely to engage in war. In some earlier cultures, men had a 60% chance of dying in warfare. Communities with less developed economies are more violent places.
We see this to a far lesser extent with frustrated managers. Lacking the power to achieve particular objectives, they resort to threats.
There is, of course, more to violence than just this variable. Cultural momentum, genetic tendency, greed, and anger all contribute to violence. But the variable that seems to me most defining is this matter of power. As people become more able to effect the changes they want, to live the life they value, they are less inclined to use force.