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Farewell retrospective of past speakers, closing night. 5:41 | More videos from Bill McKibben »

More Answers from Past Speakers

Ken Robinson

Creativity Expert

Sir Ken Robinson | March 20, 2012 | Wortham Center | The Progressive Forum

Bill Moyers

Leading Journalist

Bill Moyers | November 17, 2012 | Wortham Center | The Progressive Forum

Frank Rich

Columnist

Frank Rich | October 29, 2006 | Wortham Center | The Progressive Forum

Bill McKibben

Cofounder 350.org

Bill McKibben | April 21, 2014 | Wortham Center | The Progressive Forum

James Hansen

Director, NASA Goddard Institute for Space Studies

James Hansen | December 7, 2009 | Wortham Center | The Progressive Forum

Lester Brown

Founder: Earth Policy Institute

Lester Brown | April 28, 2009 | October 6, 2013 | The Progressive Forum

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