This book offers a concise yet comprehensive review of the principles of EU external relations law. By carefully examining the role of the Union on the global scene, it provides a systematic overview of the relevant rules and competences, reflecting on the legal developments in their political and societal context. In addition to up-to-date analyses of, inter alia, the Common Foreign and Security Policy, the Common Security and Defence Policy and the Common Commercial Policy, it highlights the EU's external powers with regard to the environment, fundamental rights and development...