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

More Answers from Past Speakers

George Soros

Philanthropist and Financier

George Soros | September 7, 2006 | Hobby Center | The Progressive Forum

James Hansen

Director, NASA Goddard Institute for Space Studies

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

Michael Pollan

Journalist

Michael Pollan | October 27, 2011 | Wortham Center | The Progressive Forum

Cecile Richards

President, Planned Parenthood Federation

Cecile Richards | January 27, 2014 | Wortham Center | The Progressive Forum

Richard Dawkins

Evolutionary Biologist

Richard Dawkins | October 5, 2010 | Wortham Center | The Progressive Forum

Gloria Steinem

Feminist, Activist, Writer

Gloria Steinem | September 17, 2007 | Wortham Center | The Progressive Forum