Voltaire described Europe as “a kind of great republic, divided into several states, some monarchical, the others mixed but all corresponding with one another. They all have the same religious foundation, even if divided into several confessions. They all have the same principles of public law and politics unknown in other parts of the world.” Ten years ago, this January 1st, in a way that Charlemagne, Voltaire, William Penn and Gladstone, the early advocates of European unity, could only dream, a united Europe became a reality. A single currency was the most dramatic of the steps taken towards what surely one day will be a single political entity.