The Centers for Disease Control and Prevention have identified youth violence as a major public health problem. What impact does exposure to violence--be it in the form of victimization, observation, or knowledge--have on young people? How do they develop a sense of morality? And how does it affect their perception of the world around them? Devoted to this crisis in American life, this volume--originally published as a special issue of the Journal of Psychiatry-- documents the rise in violence in our communities and explores its impact on children's physical, psychological, and social development.