This text surveys current conceptual, theoretical, and methodological approaches to global climate change and international relations. Although it focuses on the role of states, it also examines the role of nonstate actors and international organizations whenever state-centric explanations are insufficient. The book begins with a discussion of environmental constraints on human activities, the environmental consequences of human activities, and the history of global climate change cooperation. It then moves to an analysis of the global climate regime from various conceptual and theoretical perspectives. These include realism and neorealism, historical materialism, neoliberal institutionalism and regime theory, and epistemic community and cognitive approaches. Stressing the role of nonstate actors, the book looks at the importance of the domestic-international relationship in negotiations on climate change. It then looks at game-theoretical and simulation approaches to the politics of global climate change. It emphasizes questions of equity and the legal difficulties of implementing the UN Framework Convention on Climate Change and the Kyoto Protocol. It concludes with a discussion of global climate change and other aspects of international relations, including other global environmental accords and world trade. The book also contains Internet references to major relevant documents.