'This book represents an attempt to rethink and redevelop the English School project as a coherent research program. Although it builds on the basic assumptions and premises that underlie the English School framework, it greatly expands the scope of the project and rethinks many of the fundamental issues and tensions. It actively engages with much of American social science and sociological literatures, makes some very nice links to American constructivist scholarship, and offers some excellent ways to improve the Wendtian approach. I view the manuscript as the most important English School work in a generation.' Bruce Cronin, City College of New York

'The domain of world society has for some time been a neglected dimension in English School theorizing. Barry Buzan's book has not only filled this gap, it has radically reconfigured the relationship between international system, international society and world society. The result is a formidable work of grand theory. At last we have a work in the English School which is analytically rigorous enough to meet the high standards set by the best recent American IR theory while at the same time remaining faithful to the richness of the original sociological institutionalism.' Tim Dunne, University of Exeter

'From International to World Society? is the most important contribution to the English School's grand theory for a decade … there is no doubt that the volume makes an important and ground-breaking contribution to both English School theory and International Relations theory more broadly … if it is read as Buzan intends, as an opening rather than an ending, there is no doubt that this volume makes an important and ground-breaking contribution to both English School theory and International Relations theory more broadly.' Alex J. Bellamy, International Affairs