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The ideas of economists and political philosophers, both when they are right and when they are wrong, are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men, who believe themselves to be quite exempt from any intellectual influences, are usually the slaves of some defunct economist. Madmen in authori­ty, who hear voices in the air, are distilling their frenzy from some academic scribbler of a few years back.

John Maynard Keynes (former academic scribbler)