Alan Greenspan, the former chairman of the U.S. Federal Reserve who oversaw a remarkable stretch of economic growth but faced criticism for his role in the lead-up to the 2008 financial crisis, has died at the age of 100. Greenspan’s tenure at the helm of the nation’s central bank spanned nearly two decades, during which he navigated multiple economic upheavals and contributed to shaping modern monetary policy.

Born on March 6, 1926, Greenspan initially pursued a career in music, studying at the Juilliard School and performing as a clarinet and saxophone player. After being deemed unfit for military service due to a lung condition, he shifted focus to economics, eventually earning a PhD from New York University. Early in his career, Greenspan ran a consulting firm where his analytical approach to economic data became well known.

Greenspan entered the political arena in the late 1960s as an economic adviser to President Richard Nixon but only assumed a formal administration role after Nixon’s resignation, serving under President Gerald Ford. In 1987, President Ronald Reagan appointed Greenspan to chair the Federal Reserve, a position he retained until January 2006, serving under four presidents, both Republican and Democrat.

His early days as Fed chair were immediately tested during the stock market crash known as “Black Monday” in October 1987, when the Dow Jones Industrial Average plummeted nearly 23 percent—the largest single-day percentage drop in its history. Greenspan responded by deploying emergency measures to infuse liquidity into financial markets, which helped to stabilize the system and prevented a more severe economic downturn resembling the Great Depression.

Throughout his tenure, Greenspan was noted for his steady and composed demeanor, as well as his readiness to lower interest rates, even as unemployment fell, challenging conventional economic wisdom. His supporters credited him with successfully guiding the U.S. economy through multiple crises, including the Mexican and Asian financial shocks, the bursting of the dotcom bubble, and the September 11 attacks.

However, Greenspan’s legacy is mixed. Critics faulted his complex and often opaque communication style and his strong belief in minimal government intervention and self-correcting markets. After his retirement, in light of the 2008 global financial crisis—which followed shortly after his departure—many reproached him for not taking more aggressive measures to regulate mortgage lending and curb financial excesses. His confidence in the markets’ ability to regulate themselves was seen by some as a key factor in the economic turmoil that ensued.

Alan Greenspan’s impact on American monetary policy and global finance remains significant, reflecting both his achievements and the debates surrounding the limits of market-driven economic governance.