The growth and spread of non-governmental organizations (NGOs) at local and international levels has attracted considerable interest and attention from policy-makers, development practitioners, academics and activists around the world. But how has this phenomenon impacted on struggles for social and environmental justice? How has it challenged - or reinforced - the forces of capitalism and colonialism? And what political, economic, social and cultural interests does this serve? NGOization - the professionalization and institutionalization of social action - has long been a hotly contested issue in grassroots social movements and communities of resistance. This book pulls together for the first time unique perspectives of social struggles and critically engaged scholars from wide range of geographical and political contexts to offer insights into the tensions and challenges of the NGO model, while considering the feasibility of alternatives.