Affectedness and Participation in International Institutions looks at the growing involvement of affected persons in global politics, such as young climate activists, indigenous movements, and persons affected by HIV/AIDS. Since the early 2000s, international organisations within various policy areas have increasingly recognised and involved affected persons’ organisations. This has promised to address long-standing legitimacy and democracy deficits of international policy making and norm setting. Yet, the powerful do not easily cede the terrain: Some major states, classic NGOs, and intergovernmental organisations seek to curtail the influence of the newcomers. The authors within this collection study these contestations from an interdisciplinary political science and international law perspective. Based on evidence from a broad range of policy areas, we address some of the crucial questions: What does it mean to be affected? How can affected groups meaningfully participate in international negotiations? Whose voices do still remain excluded? Ultimately, the authors chart whether the rising involvement of the ‘most affected’ will re-shape global politics and social struggles on the ground.Taking a dual political science and international law perspective, Affectedness and Participation in International Institutions will be of great interest to scholars of civil society in global governance, international law, and international institutions. This book was originally published as a special issue of Third World Thematics.