This groundbreaking new textbook offers extensive coverage of EU External Action studies, from its major concepts to the key theories in the field. Over the past decades, the European Union has progressively developed into a significant global actor in an increasing number of policy fields. This long-awaited volume looks into different ways of conceptualizing the EU as a global actor, the processes and impact of EU external action, explanations offered by IR and integration theories, the discursive, normative, practice and gender ‘turns’, and the ‘decentring agenda’ for EU external action. The book offers a reader-friendly guidance on these various ways in which to study the EU as a global actor: each chapter introduces one concept, approach or theory and illustrates its application by a case study of EU external action. In drawing the different perspectives together, the book underscores that ‘EU External Action Studies’ is becoming an academic speciality in its own right.