This book discusses the impact of cultural diversities and identities on regional and interregional cooperation, as well as on multilateralism. "As the world debates the future shape of international order, this volume, bringing together some of the best academic scholars on regionalism, offers a feast of ideas about how different actors and forces might reshape modernity, and redefine the theory and practice of multilateralism." - Amitav Acharya, American University, USA. "This innovative edited volume is not only collecting the best worldwide specialists of regional cooperation and interregional relations, but it also provides us with inspiring inputs beyond the epistemic community of scholars, policy makers and citizens who are interested and committed to the construction of a new post-hegemonic, multilayered and more legitimate multilateralism." - Maria Joao Rodrigues, President of the Foundation European Progressive Studies, Belgium. "This is a wonderful and inspiring book on the concepts, perceptions and realities of regionalisms in our globalised world. It contrasts competitive and cooperative regionalism and outlines a vision of cooperative multipolarity." - Eun-Jeung Lee, Freie Universitaet Berlin, Germany.