The Federal Reserve chairman - an economist and a disciple of libertarian icon Ayn Rand — met his first major challenge in office by preventing the 1987 stock-market crash from spiraling into something much worse. Then, in the 1990s, he presided over a long economic and financial-market boom and attained the status of Washington's resident wizard. But the super-low interest rates Greenspan brought in the early 2000s and his long-standing disdain for regulation are now held up as leading causes of the mortgage crisis. The maestro admitted in an October congressional hearing that he had "made a mistake in presuming" that financial firms could regulate themselves. We concede that he had a lot to deal with on his watch and the lowering of interests rates in the wake of the 911 attacks helped stimulate market activity, but the reckless regard for the market and the impact of the greed feeding on cheap money could well have been spotted by the leadership and for this grandpa Greenspan ends up on the list of Amercias Most Smashable.