This issue offers an explanation of community building priniciples and how they can be applied working with youth. The authors provide examples of how community building can be connected to youth development and how youth can be change agents. The community building field emphasizes the importance of networking and building relations, enabling all members of a community to be change agents. Self-determination and change are not new to youth workers. What is new is expanding the work to enable youth to apply these skills to the greater community. This is the 106th volume of the Jossey-Bass quarterly report series "New Directions for Youth Development".