Peter Willetts examines the variety of different NGOs, their structure, membership and activities, and their complex relationship with social movements and civil society. He makes us aware that there are many more NGOs exercising influence in the United Nations system than the few famous ones. Conventional thinking is challenged in a radical manner on four questions: This is the definitive guide to this crucial area within international politics and should be required reading for students, NGO activists, and policy-makers.