Alan Greenspan, a powerful voice in shaping the American economy as Chairman of the Federal Reserve for 20 years, died on June 22. He was 100.

Greenspan was a champion of capitalism, markets, and managing interest rates to fight inflation. His critics argued he did not do enough in regulating the new financial instruments that were responsible for the financial crisis.

Greenspan, along with his wife, the respected NBC News correspondent Andrea Mitchell, was a well-known mover and shaker in the Washington social establishment. In his earlier life, Greenspan was an intellectual companion of the writer Ayn Rand and, throughout his life, reflected a fierce curiosity about economic theories and political policy.

It is an interesting moment to consider the career of Alan Greenspan as a new Fed Chairman, Kevin Warsh, takes office and President Trump often expresses his combative position in favor of lower interest rates.

Here is a conversation from 2007 about his then newly published autobiography, The Age of Turbulence: Adventures in a New World.