Alan Greenspan, the former Chairman of the U.S. Federal Reserve, died on Monday at the age of 100 due to complications from Parkinson's disease. Greenspan led the central bank for more than 18 years, from 1987 to 2006, under four different presidents: Ronald Reagan, George H.W. Bush, Bill Clinton, and George W. Bush. His tenure was marked by significant economic growth and prosperity, often earning him titles such as "Oracle" and "Maestro." He was instrumental in navigating the U.S. economy through critical moments such as the 1987 stock market crash, the 1997-1998 Asian and Russian financial crises, the dot-com bubble collapse in 2000, and the economic aftermath of the September 11, 2001, attacks.

Greenspan's legacy, however, became significantly tarnished after his departure, particularly with the onset of the 2007-2009 financial crisis. Critics pointed to his policies, including sustained low interest rates and a libertarian approach to financial deregulation, as factors that fueled asset price bubbles and contributed to the housing market collapse. He himself later acknowledged a mistake in assuming that financial institutions could effectively self-regulate.

His leadership during the 1987 stock market crash, where he swiftly assured Wall Street that the Fed would provide necessary liquidity, earned him widespread praise for restoring calm. Similarly, he cut interest rates aggressively after the 9/11 attacks, from 6% to 1%, a 46-year low, to stabilize the economy. While these actions were credited with fostering a decade-long economic boom from 1991 to 2001, they also laid the groundwork for future instability, as identified by the bipartisan Financial Crisis Inquiry Commission.

Greenspan, a former jazz musician and protege of Ayn Rand, oversaw a period of historically low unemployment and was initially celebrated for his mastery of monetary policy. However, the subsequent financial meltdown led to a reassessment of his policies, particularly his stance on deregulation, which many experts believe enabled the risky behavior of banks and the subprime mortgage crisis. His successors at the Fed adopted new approaches, including clearer communication, set inflation targets, and more proactive regulatory tools to address issues Greenspan had not confronted.

Born on March 6, 1926, in New York City, Greenspan had a distinguished career prior to the Fed, including serving as Chairman of the Council of Economic Advisers under President Gerald Ford. He published a memoir in 2007, "The Age of Turbulence: Adventures in a New World," and continued to offer his perspective on economic matters even in his later years. His death marks the end of an era for a central banker who profoundly shaped two decades of American economic policy.