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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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Arianna Huffington

Founder, The Huffington Post

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Arianna Huffington | September 15, 2010 | Wortham Center | The Progressive Forum

True Climate Solutions

Debunking the Hype Around Carbon Capture, Hydrogen, & LNG Export

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Robert F. Kennedy, Jr.

Environmental Activist

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

Tim Flannery

Scientist, Naturalist, Author

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

Alexander Vindman

Former White House National Security Council Staff

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Ken Burns

Acclaimed Documentary Filmmaker

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Ken Burns | November 13, 2007 | Wortham Center | The Progressive Forum

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