The essays which appear in this work are based on the papers presented at a two-day conference held in Liverpool in July 2007 to celebrate the 50th anniversary of the signing of the Treaty of Rome establishing the EEC. The collection reflects critically upon some of the EU's historic characteristics and speculates imaginatively on some of the diverse challenges facing the Union in the future. Contributions from both established and emerging scholars of EU law and policy are united by two main themes: the paradox of the resilient yet unstable basis of the Union's constitutional fundamentals, and the ever-contested balance between the EU's core economic mission and its broader social values and aspirations. For any student, scholar or practitioner interested in the dynamic nature of the constitutional relationship between the Union and its Member States, and in the complex tensions underpinning the EU's substantive policies, these essays will be essential reading.