Would it not be safe to say that Keynes, though maybe not the first to develope the idea, caused economists to understand the obvious that consumption is the main engine of economic development, and the lack of consumption is the primary factor in economic stagnation. All of which seems pretty obvious, at least outside of Chicago. And that tinkering with interest rates if consumption is lacking will not always stimulate the economy, hense Keynes' contribution of the Keynesian liguidity trap.(posted 8670 days ago)