Central banks have undertaken a revolution in monetary policy. They reluctantly abandoned conventional wisdom designed to keep them out of political trouble. This paper looks at this revolution through the lens of the divergent perspectives of the IMF and the BIS. The Jeremiahs predicted this revolution would fail to reduce unemployment and lead only to financial ruin. The Jeremiahs were proved wrong on both counts. Radical whatever-it-takes monetary expansion rescued a depressed world economy. Regulatory reform kept financial risks in check.