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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 »

Visit Past Speaker Pages

Jane Goodall

Founder, Jane Goodall Institute

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

AL Gore

Nobel laureate, Environmentalist

Al Gore | June 7, 2006 | Hobby Center | The Progressive Forum

Michael Pollan

Acclaimed Thought Leader: Food, Nature, and Mind

Anthony Romero

ACLU Executive Director

ACLU Executive Director Anthony Romero

Arianna Huffington

Founder, The Huffington Post

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