Of all the institutions in our society, the government is, by far, the biggest cause of the violence. The government is the authority figure for all of us. It is the example. The government executes people because they have offended us. The government justifies and rationalizes the violence it imposes upon its victims.
Violence is almost always undesirable.
The government and especially its police powers must begin teaching restraint, self-control and negotiation. The government's example must be reason over emotionalism, disarmament over armament and restraint over extremism. The government must stop over-doing things so greatly. The violence in our culture has been caused more by cops than by movies, more by the government than by video games, more by armies than by guns. Many men are in prison because they were good students.