An authoritative survey of the discipline's diverse and evolving theoretical terrain, as well as nuanced analysis of the key concepts, debates, and ideas that have animated the study of international relations.

Suwita Hani Randhawa, Senior Lecturer in Politics and International Relations, UWE Bristol, UK

This textbook brings together an outstanding array of scholars to offer a comprehensive outline of the main theories of International Relations and how they relate to a changing world.

Steven Slaughter, Associate Professor, Deakin University, Australia

Overseen by a new editorial team, with new and updated chapters, the sixth edition of Theories of International Relations provides a refreshing and dynamic insight into the state of the discipline at the start of the 2020s. Chapters offer a rich – yet systematic – discussion of core theories in International Relations, and readers are invited to consider how these theories help us make sense of, and respond to, our contemporary global challenges: making Theories of International Relations an indispensable resource for students and researchers alike.

Laura McLeod, Senior Lecturer in International Politics, University of Manchester, UK

This book not only provides excellent coverage of a wide range of theoretical approaches in International Relations, but its introduction situates them in a critical historical dialogue that should be instructive for students and teachers alike. The line-up of contributors is stellar, and the treatment of approaches is nuanced and very much up to date.

Luis Cabrera, Associate Professor of Political Science, Griffith University, Australia

This textbook continues to be core reading for students of International Relations. The inclusion of chapters on postcolonialism and institutionalism make important contributions to the scope of this key text. A fantastic next step for this book.

Samantha Cooke, Senior Lecturer in International Relations and International Politics, Liverpool John Moores University, UK