Introduction

This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book explores the new concept in International Relations, that of the 'Cusp State', or states that find themselves existing, operating and often struggling 'on the cusp'. It considers the relationship between Cusp States and Regionalism, because of the extent to which these concepts frequently rub up against one another, and the usefulness of Regionalism in helping to make sense of Cusp States. The book explores some classic contexts, both positive and negative, in which the Cusp State finds itself. The status of Cusp States or straddling states or gravitational states are all placed analytically and geopolitically to focus on link up multiple regions. Some Cusp States may, like Brazil, be considered both objectively 'strong' in terms of demographic and geographical size, and economic growth and subjectively strong in terms of its self-confidence or prestige.