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

More Answers from Past Speakers

Alice Waters

Restaurateur, Author, Activist

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

George Soros

Philanthropist and Financier

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

Edward O. Wilson

Biologist, Conservationist, Theorist

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

Sylvia Earle

Oceanographer

Sylvia Earle | April 5, 2011 | Wortham Center, Houston | The Progressive Forum

George Lakoff

Cognitive Linguist

George Lakoff | February 28, 2008 | Wortham Center | The Progressive Forum