Amidst the continued debate surrounding the foundations of IPE, coupled with recent methodological and theoretical divides this book argues that an attempt should be made to re-visit the notion of the 'critical'. The challenge posed by contributors to this volume is to assess the development of so-called critical IPE and interrogate whether the theoretical foundations it was built upon have reached their potential. The essays in this volume take up this challenge in a number of different ways but all share a common concern - to re-assess the purpose of critical approaches, reflect on why certain social theorists have been favoured as a point of departure, yet others have largely been ignored. In light of recent debates on the notion of a 'trans-Atlantic divide' within IPE the collection the contributors aim demonstrates how the distinction between the 'critical' and the 'orthodox' (or 'empirical') is only significant if the 'critical' is geared towards a larger, more substantial body of critical social enquiry and engages with what it means to conduct such enquiry.