Alan Greenspan was a titan among Federal Reserve chairs. What's his legacy?

Alan Greenspan, who led the Federal Reserve for nearly two decades, died Monday at his home in Washington. He was 100.Greenspan was the rare celebrity among central bankers, lionized for his economic stewardship in the 1990s — and a reputation tarnished by the global financial crisis of 2008.With a career that spanned decades and four presidents, what legacy…