This first study of faith-based development NGOs¿ (FBOs) political roles focuses on how U.S. FBOs in international development educate and mobilize their constituencies. Most pursue cautious reformist agendas, but FBOs have sometimes played important roles in social movements. Nelson unpacks those political roles by examining the prominence of advocacy in the organizations, the issues they address and avoid, their transnational relationships, and their relationships with religious and secular social movements. The agencies that educate and mobilize U.S. constituencies most actively are associated with small Christian sects or with non-Christian minority faiths with historic commitments to activism or service. Specialized advocacy NGOs play important roles, and emerging