A hundred years ago, the most famous banker in America testified before Congress in one of his last public appearances. His name (hint: you’ve seen it in recent headlines) was John Pierpont Morgan, the redoubtable founding father of today’s JPMorgan Chase. At the time, Morgan was without peer in American banking, simultaneously the old man and the great innovator of American finance. The list of corporations he organized was legendary: U.S. Steel, International Harvester, General Electric. So was his personal power. From the dawn of the Gilded Age, he reigned as “the boss of bosses,” in the words of muckraker Lincoln Steffens, a mystical figurehead and ruthless businessman wrapped up in a single top-hatted, pot-bellied package.