"The best way to destroy the capitalist system is to debauch the currency," said Lord Keynes. Ben Bernanke disagrees. A student of the Depression, the Fed chair appears far more fearful of deflation -- a vicious cycle of falling prices, debt defaults, home foreclosures and rising unemployment. Deflation is what America underwent in the 1930s. A Fed-created bubble burst, causing margin calls to go out to stockholders, who ran to their banks that, besieged, collapsed, wiping out a third of our money. As Milton Friedman, who won a Nobel for his thesis that the Federal Reserve caused the Great Depression,...