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

More Answers from Past Speakers

Robert F. Kennedy, Jr.

Environmental Activist

Robert F. Kennedy, Jr. | November 5, 2012 | Wortham Center | The Progressive For

Jane Goodall

Founder, Jane Goodall Institute

Jane Goodall | March 9, 2011 | Wortham Center, Houston | The Progressive Forum

Larry Wilmore

The Daily Show "Senior Black Correspondent"

Larry Wilmore | February 25, 2009 | Wortham Center | The Progressive Forum

Richard Leakey

Paleoanthropologist, Conservationist, Statesman

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

Alice Waters

Restaurateur, Author, Activist

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

Sonia Sotomayor

Supreme Court Justice

Sonia Sotomayor | January 22, 2013 | Wortham Center | The Progressive Forum