The European Union has expanded from 15 to 25 countries, with more candidates knocking on the door. This new diversity both enriches the EU and challenges its cohesion. Is a bigger EU a better EU? Where does “Europe” end? The Calouste Gulbenkian Foundation asked prominent authors from EU nations and important neighbors to examine the implications and consequences of European Union enlargement. The New Frontiers of Europe offers a range of views on the opportunities and challenges posed by these historical changes. Contributors include: Jean-Louis Bourlanges, Boris Cizelj, Antione Compagnon, Therese Delpech, Ragip Duran, Michael Emerson, Yegor Gaidar, Laszlo Halpern, Daniel S. Hamilton, Josef Jarab, Antonio Monteiro, Jiri Pehe, Jorge Sampaio, Roxanne Silberman, Jean-Claude Trichet, Emilio Rui Vilar, and Michael P. Zuckert.