Chapter 1 presents the main epistemological framework and ontological claims of the book and asserts that regions should be understood primarily as legal regimes. Through the marriage of material power, ideational forces and institutions this book aims to promote an understanding of regions as fundamentally legal regimes. The law generates an assumption of the ‘right’ and ‘just’ way to live, guiding behaviour of institutions and of people through legal codification of norms. Legal philosophers are concerned with the validity of legal norms, their claim to correctness, and to understanding the reasoning and logic of the legal system while sociologically informed analyses of law seek to reveal the practical or empirically valid nature of legal norms in relation to other spheres of action, such as politics and the economy. Using the discourse theory of law, this book proposes that legitimate law is that which is normatively perceived to provide ‘good’ reasons for action. This book aims to demonstrate how legitimate law can emerge from a discursive and participative process of deliberation. It will be argued that the EPAs have created discursive spaces for deliberation albeit the inclusion of non-state actors in that process across the regional groupings has been limited. As such, the extent to which the EPAs constitute legitimate legal regimes in a Habermasian sense is questionable.