When approached by Plenum to put together a volume of social science research on the topic of "youth and justice," I found the interdisciplinary challenge of such a project intriguing. Having spent 2 years as Director of the Law and Social Science Program at the National Science Foundation, I was well aware of the rich diversity of research that could fit within that topic. I also knew that excellent research on youth and justice was coming from different communities of researchers who often were isolated from each other in their respective disciplines as psychologists, sociologists,...