This book examines the various competing interpretations of Kant's foundational Perpetual Peace since its initial publication in the late eighteenth-century. According to Easley's analysis, there are two patterns of interpretations: 1) the text endorses peace proposals above the state level, 2) the text is in favour of peace proposals at the state level. The principal explanation for these two patterns resides in the rise and fall of hopes for peace through international organizations. It can also be attributed to the rise in the number of liberal states over time. Eric Easley provides a comprehensive historical background and analytical framework for understanding Perpetual Peace, allowing scholars of international relations to better understand and appreciate its complex meaning and see beyond the conventionally accepted interpretations of the day.