This volume of essays reappraises what we call the constitutional fundamentals of EU foreign relations law. We use the term foreign relations law to cover all EU external relations law, including each of the three pillars of the existing European Union architecture. Indeed, one important factor that explains the publication of this volume at this particular time is the planned entry into force, in 2009, of the Treaty of Lisbon which creates a modified and much more unified framework for the whole of the EU’s foreign relations