In the brilliant book Emotional Intelligence, Daniel Goleman describes seven key abilities most beneficial for human beings: the ability to motivate ourselves, to persist against frustration, to delay gratification, to regulate moods, to hope, to empathize, and to control impulse. Many of those who commit violence never learned these skills. If you know a young person who lacks them all, that’s an important pre-incident indicator, and he needs help. Another predictor of violence is chronic anger in childhood. If you know a child who is frequently or extremely angry, he too needs help.