The root cause of violence?

I followed a poorly labelled link yesterday, which took me to a Guardian article by Jon Ronson about some woman I’ve never heard of. This was the interesting tidbit Ronson included:

I once interviewed a prison psychiatrist, James Gilligan, who told me that every murderer he treated was harbouring a central secret – which was that they felt humiliated. “I have yet to see a serious act of violence that was not provoked by the experience of feeling shamed or humiliated, disrespected and ridiculed,” he said. His conclusion: “All violence is an attempt to replace shame with self-esteem.”

Huh!