This cutting-edge book explores the practices and socialization of the everyday foreign policy making in the European Union (EU), focusing on the individuals who shape and implement the Common Foreign and Security Policy despite a growing dissension among member states. The authors provide theoretically informed analyses based on up-to-date empirical material from the Political and Security Committee, Council working groups, the European External Action Service, EU delegations, military and civilian missions and operations and EU member state embassies. They illustrate the ways in which European foreign policy is shaped through the daily work of diplomats, exploring the communities of practice that are formed in the process of policy-making in the EU. Combining socialization and practice approaches, the book offers an innovative take on the motivations behind integration at a time of European discord. Providing a unique inside account of diplomatic practices and the coordination of EU foreign policy, this insightful book is crucial reading for students of political science and international relations at all levels seeking to better understand the minutiae of formulating and coordinating EU foreign and security policy. Its empirical analyses will also benefit scholars and researchers interested in European integration and socialization in international organizations, as well as practitioners, such as diplomats and European civil servants.