It seems long ago when Keynes realized that there was more room for fiscal policy than just being a public good provider. I believe it wasn’t just a coincidence that it was him, being a specialist in monetary issues, who came out with an answer to, probably, the most intriguing problem of his time.
His extraordinary comprehension about how the economy works planted the seeds for the emergence of a macroeconomic theory, which we are still working out and improving on a daily basis. In my opinion, we have a debt of honor to his legacy given the long misinterpretation and wrong pursuing in economic policy on his word.