Jeff Rubin

Economist and Author of The End of Growth

Nicholas Burns

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

Bjorn Lomborg

Political Scientist & Author of "The Skeptical Environmentalist"

Elliot Schrage

Former Vice President of Communications, Public Policy & Platform Marketing at Facebook

Chris Matthews

Former Host, Hardball with Chris Matthews, MSNBC

Shashi Tharoor

Diplomat & Author; Former United Nations Under-Secretary-General

Alex Steffen

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

Tan Le

CEO of EMOTIV; Non Executive Director at QBE Insurance Group; Author of "The NeuroGeneration;" Member of Global Future Council on Neurotechnologies at World Economic Forum

Protecting Your Brain at Work with EMOTIV CEO Tan Le

Dan Schulman

President & CEO of PayPal; Former President of American Express

Pat Mitchell

Editorial Director & Host of TEDWomen; Co-Chair of the Women's Media Center; Former President of CNN Productions & PBS

William Frist

Chair, The Nature Conservancy Global Board; Former U.S. Senate Majority Leader, Heart Transplant Surgeon; Founder of Founding Partner of Frist Cressey Ventures and Hope Through Healing Hands

Jon Corzine

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

Tom Morris

Business Thought Leader, Philosopher, Corporate Advisor & Best-Selling Author of "Stoicism for Dummies"