Robert Greene

New York Times Bestselling Author of "The 48 Laws of Power," "The Art of Seduction," "The 33 Strategies of War," and "The 50th Law"

Oscar Arias

Former President of Costa Rica & Nobel Laureate

Ben Goldacre

Physician; Best-Selling Academic & Science Writer

Shirley Tilghman

Molecular Biologist; Pres., Princeton University

Elizabeth Economy

C.V. Starr Senior Fellow & Director of Asia Studies at the Council on Foreign Relations

Gerry Adams

President, Sinn Fein

Seymour Hersh

Pulitzer Prize-Winning Investigative Journalist, Reporter & Political Writer

Kay Warren

Christian Author

Alex Steffen

Author of "Carbon Zero: Imagining Cities That Can Save the Planet"

Kishore Mahbubani

Distinguished Fellow, Asia Research Institute at the National University of Singapore; Former Diplomat, Academic & Author

Diane Sawyer

Anchor, ABC World News

Bill Browder

Founder & CEO of Hermitage Capital Management; Human Rights Activist; Bestselling Author of "Red Notice"

Fred Swaniker

Founder & CEO of African Leadership Group

Caroline Elkins

Professor of African Studies at Harvard University & Pulitzer Prize-Winning Author of "Imperial Reckoning"

Charles Leadbeater

Innovation Expert & Author

Patrick Byrne

Founder & CEO, Overstock.com

Wendy Sherman

Professor of the Practice of Public Leadership & Director of the Center for Public Leadership at the Harvard Kennedy School

The US approach to China with Deputy Secretary of State Wendy R. Sherman

Carla Hills

Chairman Emeritus; Chairman and CEO, Hills & Company, International Consultants; CSIS Counselor & Trustee; Former U.S. Trade Representative

Michael Smerconish

Independent Political Analyst; Host of "The Michael Smerconish Program" on SiriusXM; Host of CNN's "Smerconish;" Newspaper Columnist & Bestselling Author

General Wesley Clark

Retired Four-Star Army General & Former NATO Supreme Allied Commander