A New Juvenile Justice System aims at nothing less than a complete reform of the existing system: not minor change or even significant overhaul, but the replacement of the existing system with a different vision. The authors in this volume—academics, activists, researchers, and those who serve in the existing system—all respond in this collection to the question of what the system should be. Uniformly, they agree that an ideal system should be centered around the principle of child well-being and the goal of helping kids to achieve productive lives as citizens and members of their communities.