Violence is one of mans basic human reactions, same with love, depression, anxiety, and any other emotion. It's man's ability to balance them that seperates us from animals.
In retrospect, violence for violence sake doesn't solve anything, it might bring back a sense of
chaos for some people but for the most part unjustified or wrongly justified violence is looked down upon.
But violence does have some good outcomes, the whole reason we were in space was because America's agenda against communism and vice versa.