“The attempt to achieve and maintain justice, or to undo or prevent injustice, is the one and only universal cause of violence.”

― James Gilligan, Violence: Reflections on a National Epidemic

James Gilligan is an American psychiatrist and author, husband of Carol Gilligan and best known for his series of books entitled Violence, where he draws on 25 years of work in the American prison system to describe the motivation and causes behind violent behavior. Wikipedia