The book applies a globalising framework to the study of regional worlds in order to move beyond the traditional conception of regionalism, which views regions as competing blocs dominated by great powers. Bringing together a wide range of case studies, the book shows that regions are instead dynamic configurations of social and political identities in which a variety of actors, including the less powerful, interact and partake in regionalisation processes and have done so through centuries. "This book is an important addition to the literature; kudos to the contributors for taking on the task of clarifying what Acharya's regional 'worlds' can contribute to moving International Relations (IR) away from its Eurocentric roots. It is useful for all scholars who, albeit working from many different perspectives, have one goal in mind: decolonizing IR." Jacqueline Anne Braveboy-Wagner, City University of New York "The essays in this volume develop a crucial but so often neglected insight into the very different regional narratives of the global and, in doing so, make a valuable contribution to the on-going struggle to find better ways of studying International Relations in a post-western world." Andrew Hurrell, University of Oxford "This book takes readers on a new journey to the future of International Relations (IR) where the monolithic understanding of the world is by no means possible or appropriate. Its publication is not only timely but also much needed in materialising the study of regionalism and IR in contemporary world affairs transcending the Eurocentric imagination of the world." Kosuke Shimizu, Ryukoku University, Kyoto "This book is a crucial contribution to the study of the international. The view that the study of regions is a privileged lens for the development of global and decolonized International Relations is borne out by the analysis on offer here." Monica Herz, Pontifical Catholic University of Rio de Janeiro