Traditionally the primary function of NGOs has been confined to mitigating the effects of war by providing humanitarian aid and protection on the peripheries of violent conflict. However, in recent years there has been an increased focus on the impact of humanitarian aid in general, and to a lesser extent on the impact of aid on conflict and peace dynamics. Drawing on research and contemporary writing on conflict, NGOs, and peacebuilding, this book provides an overview of key theoretical and policy debates surrounding the changing role of NGOs and donors in conflict. It also highlights the main research findings and outlines the implications for improving policy and practice