Ben Goldacre

Physician; Best-Selling Academic & Science Writer

Josette Sheeran

President and CEO of the Asia Society; Former Vice Chairman of the World Economic Forum.

Adam Ostrow

Chief Digital Officer, TEGNA

David Miliband

President & Chief Executive Officer of the International Rescue Committee; Former UK Foreign Secretary

Neil Barofsky

Former Special Inspector General for the Troubled Asset Relief Program (TARP)

Gerry Adams

President, Sinn Fein

Anne-Marie Slaughter

Foreign Policy Expert, Author & CEO of New America Foundation

John Zogby

Trendspotter & Leading Pollster

Dambisa Moyo

Global Economist, Author & Investor in the Future

Nicholas Burns

Professor of the Practice of Diplomacy & International Politics, Harvard Kennedy School

Heather Wilson

U.S. Secretary of the Air Force

Michael Smerconish

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

Alexandra Cousteau

Environmental Activist, Storyteller & Ocean Advocate

Vali Nasr

Professor of International Affairs & Middle East Studies at Johns Hopkins University

Islamic Leviathan: Islam and the Making of State Power (Religion and Global Politics)

General Wesley Clark

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

Robert D. Kaplan

Best-Selling Author & Atlantic Monthly Correspondent

James Woolsey

Former Director of the C.I.A.

Wadah Khanfar

President & Co-founder of Al Sharq Forum & Chairman of Common Action Forum, Former Director-General of the Al Jazeera Network

Wadah Khanfar | This House Would Pressurise Israel to Exchange

Amy Myers Jaffe

Leading Expert on Global Energy Policy & Sustainability

Jimmy Wales

Founder of Wikipedia & Wikitribune