Drew Hanson, chapter 10, question 6

The most interesting part of this chapter, to me, was how important the fed and monetary policy are highlighted by the claim made by Robert Mundell that "Had the price of gold been raised in the late 1920s, or, alternately, had the major central banks pursued policies of price stability instead of adhering to the gold standard, there would have been no Great Depression, no nazi revolution, and no World War II". This seems crazy to me. How can an institution that few people understand just a few people run, be the cause of some of the most dramatic events in history, as identified by a Nobel prize winner? How can policies that have such a huge influence on world politics be so disputed?