Dr. Jonathan Foley

World Leading Climate Scientist & Executive Director of Project Drawdown

Slavoj Žižek

Philosopher & International Director of the Birkbeck Institute for the Humanities

Robin Wright

Foreign Policy Analyst, Journalist & Author of "Rock the Casbah: Rage and Rebellion across the Islamic World"

Shirin Ebadi

Nobel Peace Prize-Winning Iranian Activist & Lawyer

Mark Kramer

Co-founder of FSG, Author & Co-Creator of Shared Value Concept

Mikko Hypponen

Computer Security Expert; Chief Research Officer at WithSecure & Principal Research Advisor at F-Secure

If It's Smart, It's Vulnerable

Spencer Wells

Geneticist, Anthropologist, Author, Entrepreneur, Adjunct professor at the University of Texas at Austin

Tiffany Shlain

Founder of The Webby Awards; Emmy-Nominated Filmmaker, Bestselling Author, Internet Pioneer & Futurist

Raj Patel

Award-Winning Writer, Food Politics Activist, Filmmaker & Academic

Danny Glover

Acclaimed Actor, Producer & Leading Social Activist

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Jim Wallis

Theologian, Writer, Political Activist & Racial Justice Advocate

Christ in Crisis: Why We Need to Reclaim Jesus

An Phung

Multimedia Journalist

Ben Goldacre

Physician; Best-Selling Academic & Science Writer

John Zogby

Trendspotter & Leading Pollster

Calvin Trillin

Author, Columnist, Humorist & Political Satirist

General Wesley Clark

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

Kenneth Roth

Executive Director at Human Rights Watch

Amy Gutmann

United States Ambassador to Germany; Former President of UPenn

John Prendergast

Human Rights Advocate and Author of Unlikely Brothers

David Bellos

Translator

Dr. Samantha Nutt

Medical Doctor, Award-Winning Humanitarian, Bestselling Author & Founder of War Child USA

James Woolsey

Former Director of the C.I.A.

Jacques Pépin

Master French Chef; Food Columnist; Cookbook Author Educator

David Remnick

Editor, The New Yorker

Yves Rossy

Military-Trained Pilot & Aviation Enthusiast

Todd Kuiken

Biomedical Engineering Manager at the Rehabilitation Institute of Chicago

Justin Hall-Tipping

The Energy Evangelist, Justin Hall-Tipping works on nano-energy startups -- mastering the electron to create power.

Ingrid Newkirk

President, PETA

Stephen Walt

Robert and Renee Belfer Professor of International Affairs at Harvard University

Stephen M. Walt | Realism & Balance of Threat | GREAT MINDS