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Europe, home to some of the worst and most unworkable big ideas down the ages, has done it again. The continent may have spawned the Roman Empire, the Renaissance and the Enlightenment. It may have given humanity Michelangelo and Mozart, Bach and Balzac, Canaletto and claret. But the European legacy also includes the Spanish Inquisition, Communism, Fascism and Nazism. To this formidable list of fanaticism and failure must surely now be added the euro — a lunatic project to impose the political integration of modern Europe through the creation of a single currency.