Brad deLong publishes some advice – based on personal experience – about how to deal with post-modernism.
The climax is here (My emphasis added):
Adam Smith is the founder of economics because he has a great and extraordinary insight: that the competitive market system is a remarkably powerful social calculating and organizing mechanism, and that the sophisticated division of labor to which a competitive market system backed up by secure and honest enforcement of property rights give rise is the key to the wealth of nations. Some others before had had this insight in part: Richard Cantillon writing of how once you have specified demands the market does by itself all the heavy lifting that a central planner would need to do; Bernard de Mandeville that dextrous management by a statesman can use the power of private greed to produce the benefit of public utility. But it is Smith who sees what the power of the “system of natural liberty” that is the market could be–and who follows the argument through to the conclusion that it forever upsets and overturns the previous intellectual moves made in and conclusions reached by the discursive formation of Political Oeconomy.