The General Theory is at once both a book of economic theory and a font of economic prejudices—there are probably few academics in economics and political science who do not have an opinion of it, whether they have read it or not. It has reached the status—which it obtained almost immediately—where the fact of its existence is as important, if not more important, than what it actually says.

Hayek's Journey: The Mind of Friedrich Hayek (2003) - Ch. 6 : John Maynard Keynes