Ben Goldacre

Physician; Best-Selling Academic & Science Writer

Bjorn Lomborg

Political Scientist & Author of "The Skeptical Environmentalist"

Dan Schulman

President & CEO of PayPal; Former President of American Express

Deborah Berebichez

Data Scientist & Pioneer in Wireless Communications Technology; Founder & CEO of Solve For You

General Wesley Clark

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

Graham Hill

Founder of Life Edited & TreeHugger.com

Jeffrey Garten

Professor, Yale School of Management and Expert on Global Business Strategy

John Zogby

Trendspotter & Leading Pollster

Jon Corzine

Former Governor of New Jersey; Former CEO of Goldman Sachs & MF Global

Joy-Ann Reid

MSNBC Correspondent, Political Author & Host of "The ReidOut"

Medgar and Myrlie: Medgar Evers and the Love Story that Awakened America

Juan Williams

New York Times Best-Selling Author, Fox News Political Analyst, Co-Host of "The Five" & Award-Winning Columnist

Lynsey Addario

American Photojournalist; Contributor for National Geographic & Time Magazine

Maggie Wilderotter

Former CEO of Frontier Communications

Nicholas Burns

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

Patrick Byrne

Founder & CEO, Overstock.com

R "Ray" Wang

Founder, Chairman & Principal Analyst at Constellation Research; Author of "Disrupting Digital Business"

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Tal Ben-Shahar

Best-Selling Author & Positive Psychology Expert

Xavier Sala-i-Martin

Chief Economic Advisor to the World Economic Forum