Keynesian economics, which proposed that the government could use monetary and fiscal policy to help the economy avoid the extremes of recession and inflation, held sway for thirty years after World War II. However, it was discredited after the stagflation of the 1970s, which not only proved resistant to traditional Keynesian policies but was actually thought to be caused by them. By the 1990s, the anti-Keynesian counter-revolution seemed to reach...