MOVING THE YOUTH DEVELOPMENT MESSAGE: TURNING A VAGUE IDEA INTO A MORAL IMPERATIVE Peter L. Benson and Karen Pittman THE CONTAGION OF AN IDEA In the past fifteen years, countless programs, agencies, funding initiatives, profes- sionals, and volunteers have embraced the term "youth development. " Linked more by shared passion than by formal membership or credentials, these people and places have contributed to a wave of energy and activity not unlike that of a social movement, with a multitude of people "on the ground" connecting to a set of ideas that give sustenance, support, and value to...