This book delves into the integration of sustainability within the European Union's external activities, emphasizing the necessity to weave 'sustainability' throughout its relations with third states and international organizations. Unique in its approach, this collective work brings together a diverse range of experts, each contributing a chapter that explores different facets of sustainability in the context of the EU's increasing external actions. The pressing demands for sustainable development, as outlined in the EU Treaties-specifically Articles 3(5) and 21 of the TEU and Articles 11 and 191 of the TFEU-are examined through a compilation of theoretical analyses, legal dogmatic approaches, and detailed case studies. These contributions aim to offer a cohesive understanding of the legal implications and strategies for embedding sustainability into the EU's external engagements, providing a multidisciplinary perspective on a critical global issue.

Furthermore, the book critically examines how sustainability is operationalized within various EU external policies, providing readers with a deep dive into the mechanisms and outcomes of such integration. It addresses the challenges and opportunities that lie ahead for the EU in maintaining its commitment to sustainability, making it a timely contribution to the discourse on global environmental policy and governance.

Designed for scholars, legal practitioners, policymakers, and students interested in European Union law, sustainability, and external relations, this collective work serves as an essential resource. It offers a nuanced perspective on the complexities of legal frameworks that govern the EU's sustainable external actions and their significant impact on global environmental governance.

Ramses A. Wessel is a Professor of European Law at the Faculty of Law of the University of Groningen.

Jamile B. Mata Diz is a Professor of International Public Law and Coordinator of the Jean Monnet Center of Excellence of the Federal University of Minas Gerais.

Júlia Péret T. Társia is a PhD Candidate at the Federal University of Minas Gerais.

Saide Esra Akdogan is a lecturer and researcher at Wageningen University and Research.