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Your books discuss big questions of entire civilizations. How would you encourage others to cultivate the big questions? (1:21) | More videos from Jared Diamond »

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Richard Leakey

Paleoanthropologist, Conservationist, Statesman

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

Brian Greene

Theoretical Physicist

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

Rachel Maddow

Broadcast Journalist, Author

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Barry Scheck

Cofounder of the Innocence Project

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Barry Scheck | November 18, 2013 | Wortham Center | The Progressive Forum

Tim Flannery

Scientist, Naturalist, Author

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Tim Flannery | March 19, 2007 | Wortham Center | The Progressive Forum

Seymour Hersh

Investigative Journalist

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Seymour Hersh | March 23, 2006 | InterContinental Hotel | The Progressive Forum

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