A marvelous thing happened over on Paul Krugman's blog at the New York Times last week. Krugman effectively conceded defeat on a range of economic debates. Who defeated him? People who posted comments on his New York Times blog. Mere commenters. For those who do not know, Paul Krugman is one of the few who still claim that Keynesian progressivism is the answer to America's (and Europe's) problems, not their cause. He repeats that claim many times each month. Amid these repeated expressions of his "progressive" faith, he now also repeatedly expresses grim despair because his progressive policy prescriptions are...