"John Maynard Keynes, who died in 1946 at the age of 62, is not only the best known economist of our times but also a man who by any standards must be reckoned as one of the leading personages of the first half of the twentieth century. The history of the era which followed World War I can no more dispense with the name of this singular individual than it can with the names of Einstein, Churchill, Roosevelt, or Hitler. It is only in this broad perspective that Keynes' full importance becomes visible. How ought we to judge the influence of this man? Is he the Copernicus of economics, as so many claim, the man who banished the ghosts of economics grown rigid in the chains of tradition, who opened the door to prosperity and stability? Or did he destroy more than he created and has he summoned into being spirits that today he possibly would be gladly rid of? It is difficult to make a simple answer to these questions. A fair judgment would have to take into account not only the manifold talents and personal charm of the man, but would require also the dissection of issues which have nourished most of the economic controversies of our time and which have given even the experts pause. We may begin by noting a characteristic trait of this animated, impulsive, and artistically sensitive man: his virtuoso-like ability to change positions on important questions, positions which he had only shortly before defended with intelligence and vigor."