Alan Greenspan, who served as chairman of the US Federal Reserve for nearly two decades, has died at the age of 100. Appointed in 1987, Greenspan presided over a period of significant economic growth, notably the second-longest expansion in American history. His tenure spanned multiple administrations and included responses to events like the 1987 stock market crash and the dot-com bubble. Greenspan was known for his pragmatic approach and intellectual independence, shaping monetary policy through periods of both prosperity and crisis. He left the Federal Reserve in 2006, having guided the nation’s economy for 19 years. His policies and influence continue to be debated by economists and policymakers today.