Dr. Ervin Staub is a professor of Psychology at the University of Massachusetts, Amherst, and Director of the PhD concentration on the psychology of peace and the prevention of violence. He received his PhD from Stanford and has taught at Harvard, Stanford, the University of Hawaii, and the London School of Economics and Political Science. He studied the roots of altruism, and the origins of genocide and mass killing as well as violent conflict, terrorism, their prevention, psychological recovery, and reconciliation. His books include the two-volume “Positive Social Behavior and Morality,” “The Roots of Evil: the Origins of Genocide and Other Group Violence,” “The Psychology of Good and Evil: Why Children, Adults and Groups Help and Harm Others,” “Overcoming Evil: Genocide, Violent Conflict and Terrorism” and a number of edited books. He is the former president of the International Society for Political Psychology and of the Society for the Study of Peace, Conflict and Violence. His projects in field settings include a training program for the state of California after the Rodney King incident to reduce the use of unnecessary force by police, a program in the Netherlands to improve Dutch-Muslim relations, and a program in New Orleans to promote reconciliation after hurricane Katrina. Staub has also conducted trainings, seminars and educational radio projects in Rwanda, Burundi and the Congo to promote psychological recovery and reconciliation, workshops for raising caring and non-violent children, and a program for Training Active Bystanders in schools to reduce harmful behavior by students.