Christopher Hill is Montague Burton Professor of International Relations at the London School of Economics. He is a well-known authority in the field and among other works has edited The Actors in Europe’s Foreign Policy and co-edited Two Worlds of International Relations: Academics, Practitioners and Trade in Ideas, both published by Routledge. Karen E. Smith is lecturer in international relations at the LSE, and the author of The Making of EU Foreign Policy: The Case of Eastern Europe.