Since the end of the Cold War, globalization has brought new actors to the political arena. One of those which have attracted considerable attention in academic research is civil society or NGOs. Kissling addresses the topic of civil society participation in the nuclear non-proliferation regime. The regime qualifies well for this objective since it features, given its characteristics as a treaty regime in the international security field, notable legal avenues for civil society participation.The study takes on a twofold perspective. On the one hand, the empirical question whether civil society can contribute to the evolution of regimes in the security field is addressed, especially when it comes to security cooperation. On the other hand, it is questioned whether civil society can, under certain conditions, even contribute to the democratic quality of international decision-making. Here, empirical findings are used in order to test normative political theories on the legitimacy and democracy of global institutions.This title cuts across different issue areas of international relations and as such it can be used to serve many different purposes. For lecturers, this book is ideal for courses on international institutions, globalization, security studies and democracy.