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

More Answers from Past Speakers

Edward O. Wilson

Biologist, Conservationist, Theorist

Edward O. Wilson | September 27, 2006 | Wortham Center | The Progressive Forum

Alice Waters

Restaurateur, Author, Activist

Alice Waters | February 27, 2012 | Wortham Center | The Progressive Forum

Molly Ivins

Political Columnist

Molly Ivins| April 17, 2006 | Wortham Center | The Progressive Forum

Richard Leakey

Paleoanthropologist, Conservationist, Statesman

Richard Leakey | October 28, 2010 | Wortham Center | The Progressive Forum

Gloria Steinem

Feminist, Activist, Writer

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

Brian Greene

Theoretical Physicist

Brian Greene | September 29, 2009 | Wortham Center | The Progressive Forum