War, Diplomacy, and Peacemaking opens with an introduction that explains how the dialectic between war and peace has been perceived by different cultures-in ancient Greece and India, for example, in traditions of "salvation religions" like Christianity and Islam, and in the modern era, where regulated systems of diplomacy serve both to mitigate war and aim toward creating a global culture of peace. The shows how economies and environmental crises, both of which played a role in the origins of war, may contribute to the further continuation of warfare in the twenty-first century.