Book excerpt: This book examines migration as a key element of the European Union's (EU’s) foreign policy and thus a critical domain for understanding and evaluating EU external action. It documents, explains, and assesses the implementation of EU migration policies, especially after the crisis of 2015, providing a much-needed overall evaluation and comparison in different geographic contexts. Applying a composite approach to global political justice, it affords a normative assessment of EU’s action and shows the tensions between the justice claims of the many actors involved in the EU migration system of governance. This book will be of key interest to scholars, students and policymakers in European Union external/foreign policy, migration and refugee studies, global justice, ethics and more broadly to European studies/politics, and international relations.