This book provides a comprehensive new introduction to the study of international diplomacy, covering both theory and practice. The text summarises and discusses the major trends in the field of diplomacy descriptively, analytically, and normatively. To this end, it provides an innovative theoretical approach to understanding diplomacy not as a collection of practices or a set of historical traditions, but as a method of continual reconciliation between the interests of states (raison d " tat) and those of international society (raison de syst me). This is explored by demonstrating how the rise of new issues in international politics challenges actors to rearticulate preferences, adjust methods, and create new meanings in order to make sense of how to relate to the other members of the international community. In sum, this book provides an up-to-date, accessible and authoritative overview of how diplomacy works and, indeed, ought to work in a globalized world. Specifically, this book: describes the evolution of diplomacy since the 15thcentury, providing a detailed overview of the pluralisation of actors, the move towards multilateralism and the proliferation of issue areas. examines theoretical explanations about how diplomacy makes the world, focusing on decision-making, management of relations between states and non-state actors, and the construction of meaning that actors attach to the world. discusses normative approaches to how diplomacy ought to re-make the world, addressing the role and training of the diplomat, diplomatic and legal interferences with state sovereignty, and the workings of international organizations. This new textbook will be essential reading for upper-level UG students of international diplomacy and crisis negotiation, and highly recommended for students of conflict resolution, international organisations, foreign policy, and IR in general.