This book explores the phenomenon of regionalism. In a seeming contradiction to globalization, there is a growing tendency for countries to enter into regional arrangements as a response to the pressures of operating in a global marketplace. But regionalism is also emerging as a phenomenon in its own right, serving distinct purposes and taking different forms in different areas. The contributors explore how these patterns impact on wider issues such as global governance, democracy and trade. The book reviews the major theoretical approaches to regional cooperation including perspectives from international relations, political economy, economics and sociology. It is divided into three main sections: theoretical approaches to regionalism; issues of regional cooperation (such as security, monetary issues, identity and integration); and an exploration of specific case studies including the Middle East, Africa, the Americas, China, Europe, Asia and the Pacific. With an international range of contributors, including Bjorn Hettne, Louise Fawcett and Andrew Hurrell, this in-depth and multi-disciplinary guide will be of interest to students across the social sciences and to the wider policy community.