The common feature of all conflicts is the mentality that thinks, "People should be a certain way and we should use force to make them that way." Pick an issue and you will see this truth in action.
Self defense?
@Cogitarius Are all conflicts resolved with force?
@Cogitarius Thanks. You make a profound point! Live and let live does not seem to be applicable to "policy". At least these days; It seems to be a crazed world.