Was Keynes's Monetary Policy, a outrance in the Treatise, a Forerunnner of ZIRP and QE? Did He Change His Mind in the General Theory?

At the end of 1930, as the 1929 US stock market crash was starting to have an impact on the real economy in the form of falling commodity prices, falling output, and rising unemployment, John Maynard Keynes, in the concluding chapters of his Treatise on Money, launched a challenge to monetary authorities to take "deliberate and vigorous action" to reduce interest rates and reverse the crisis. He argues that until "extraordinary," "unorthodox" monetary policy action "has been taken along such lines as these and has failed, need we, in the light of the argument of this treatise, admit that the banking system can not, on this occasion, control the rate of investment, and, therefore, the level of prices." The "unorthodox" policies that Keynes recommends are a near-perfect description of the Japanese central bank's experiment with a zero interest rate policy (ZIRP) in the 1990s and the Federal Reserve's experiment with ZIRP, accompanied by quantitative easing (QE1 and QE2), during the recent crisis. These experiments may be considered a response to Keynes's challenge, and to provide a clear test of his belief in the power of monetary policy to counter financial crisis. That response would appear to be an unequivocal No.