Nancy Guerra holds a doctorate in human development and psychology from Harvard University. She has designed and implemented interventions to promote social-emotional learning and prevent violence with children and youth.

Kirk R. Williams has a PhD in sociology from the University of Arizona. He is professor emeritus in the Department of Criminology, Law and Society at the University of California, Irvine. He studies the causes and prevention of youth violence and adult intimate partner violence with an emphasis on domestic violence risk assessment.