"The Great Recession of 2008 restored John Maynard Keynes to prominence. After decades when the Keynesian revolution seemed to have been forgotten, the great British theorist was suddenly everywhere. The New York Times asked, "What would Keynes have done?" The Financial Times wrote of "the undeniable shift to Keynes." Le Monde pronounced the economic collapse Keynes's "revenge." Two years later, following bank bailouts and Tea Party fundamentalism,...