Alan Greenspan, the former chair of the Federal Reserve who oversaw a period of significant economic growth in the United States, has died at the age of 100. Appointed in 1987 by President Ronald Reagan and serving through 2006 under Presidents Bill Clinton and George W. Bush, Greenspan was widely credited with fostering a decade of prosperity in the 1990s. However, his tenure also coincided with deregulation of the financial industry. Following the 2008 financial crisis, Greenspan faced considerable criticism for policies believed to have contributed to the housing bubble and subsequent economic collapse. Despite the controversy, he remained a prominent figure in economic discourse, defending his approach while acknowledging flaws in his understanding of financial markets. His death marks the end of an era for American economic policy.