Now in its second edition, Fifty Key Thinkers in International Relations has been thoroughly updated with several new entries and a new preface to reflect the latest developments. There are new sections on Constructivism, International Political Theory, and English School, as well as a range of new thinkers. They include:

• Samuel Huntington
• Christine Sylvester
• Jürgen Habermas
• John Rawls
• Barry Buzan

Fully cross-referenced throughout, this book has everything for students of politics and international relations or indeed anyone who wants to gain an understanding of how nations can work together successfully.

'Especially helpful for students attempting to gain a sense of the scope and diversity of thinking in contemporary International Relations, this text is a compendium of some of the field’s most influential theorists along with clear, accessible, and thoughtfully contextualized summaries of their most important insights. Despite their brevity and concision, individual chapters include not just synopses and assessments of these thinkers’ contributions, but also bibliographic references to their most important works, and to those of their interpreters and critics. This book is a fine launching point for thoughtful engagement with the broad field of IR.' - Mark Rupert, Syracuse University, USA

Martin Griffiths is Associate Professor in the School of Political and International Studies at Flinders University, Australia. He is the author of International Relations Theory for the 21st Century (2007), Realism, Idealism, and International Politics (1995), and co-author (with Terry O'Callaghan and Steven C. Roach) of International Relations: The Key Concepts. Second Edition (2007), all available from Routledge.

Steven C. Roach is Assistant Professor of International Affairs in the Department of Government and International Affairs at the University of South Florida. Among his books are Critical Theory of International Politics (Routledge, forthcoming), Governance, Order, and the International Criminal Court (2009), Critical Theory and International Relations: A Reader (Routledge, 2007), and Politicizing the International Criminal Court (2006).

M. Scott Solomon is Assistant Professor of International Affairs in the Department of Government and International Affairs at the University of South Florida. He is the co-author (with Mark Rupert) of Globalization and International Political Economy: The Politics of Alternative Futures (2006).