Alan Greenspan, one of the most influential economic policymakers in modern history, has died at the age of 100. His passing marks the end of an era for global finance and monetary policy. Greenspan served as chairman of the U.S. Federal Reserve from 1987 to 2006, overseeing one of the longest periods of economic expansion in American history while navigating major financial crises and market upheavals. During his nearly two-decade tenure, Greenspan worked under four U.S. presidents and became synonymous with central banking. Investors around the world closely monitored his speeches and congressional testimony for clues about interest rate decisions and economic conditions. His influence extended far beyond the United States, shaping monetary policy discussions across Europe, Asia, and emerging markets. Greenspan's leadership began shortly before the 1987 stock market crash known as Black Monday. His swift actions to provide liquidity helped stabilize markets and established the Federal Reserve's reputation as a guardian of financial stability. Throughout the 1990s, he oversaw a period of robust economic growth fueled by technological innovation, productivity gains, and expanding global trade. Supporters praised Greenspan for helping maintain low inflation while encouraging economic growth. Critics, however, argued that prolonged periods of low interest rates contributed to speculative bubbles, particularly in housing markets. Following the 2008 global financial crisis, some economists pointed to regulatory shortcomings during his tenure as contributing factors to systemic financial risks. Despite ongoing debates about his legacy, Greenspan remained one of the most recognizable figures in economics. His philosophy favored market-driven solutions and limited government intervention. Those views influenced generations of policymakers and economists. Financial institutions, former colleagues, and political leaders have expressed condolences, highlighting Greenspan's role in shaping modern central banking. Markets reacted with reflection rather than volatility, as investors remembered a figure whose decisions once moved trillions of dollars in assets worldwide. His death comes at a time when central banks face renewed challenges, including inflation, technological disruption, and geopolitical uncertainty. Greenspan's career continues to serve as a case study for policymakers attempting to balance economic growth, financial stability, and price control. As tributes continue, historians and economists are expected to revisit both his accomplishments and controversies. Regardless of differing opinions, Alan Greenspan's impact on the global financial system remains undeniable, and his influence will continue to be studied for decades.