Definition of Violence

I always studied and did reports on the acts of violence... but being that there are so many reasons and explanations for ones actions I really couldn't put my finger to what was violence... Not until I came accross this quote:
"Violence as a way of achieving racial justice is booth impractical and immoral. It is impractical because it is a descending a spiral ending in destruction for all. The old law of an eye for an eye leaves everybody blind. It is immoral because it seeks to humiliate the opponent rather than win his understanding. it seeks to annihilate rather than to convert. Violence is immoral because it thrives on hatred rather than love. It destroys community and makes brotherhood impossible. It leaves society in monologue rather than dialogue. Violence ends by defeating itself. It creates bitterness in the survivors and brutality in the destroyers."
-Martin Luther King, Jr.