Let’s not delude ourselves: if the euro falls apart, so will the European Union (the world’s largest economy), triggering a global economic crisis on a scale that most people alive today have never experienced. Europe is on the edge of an abyss, and will surely tumble into it unless Germany – and France – alters course.

France will have to say yes to a political union: a common government with common parliamentary control for the eurozone. The eurozone’s national governments already are acting in unison as a de facto government to address the crisis. What is becoming increasingly true in practice should be carried forward and formalized.