Alan Greenspan, who served as chair of the U.S. Federal Reserve for nearly two decades, has died at the age of 100. He profoundly influenced American economic policy during his tenure, which spanned from 1987 to 2006. Initially lauded as one of the most effective central bankers in history upon his retirement, Greenspan later faced intense criticism for his role in the 2008 financial crisis. His policies, characterized by deregulation, were credited with periods of economic prosperity but also blamed for contributing to the conditions that led to the crisis. Greenspan’s long career saw him navigate numerous economic challenges, including the dot-com bubble and the aftermath of the 9/11 attacks. His death prompts renewed discussion about his complex and controversial economic legacy.