Michael Schrage, research fellow at MIT Sloan School's Center for Digital Business and author of the HBR Single "Who Do You Want Your Customers to Become?"

Charles Duhigg, reporter for The New York Times and author of "The Power of Habit: Why We Do What We Do in Life and Business."

Grant McCracken, anthropologist and author of "Culturematic: How Reality TV, John Cheever, a Pie Lab, Julia Child, Fantasy Football . . . Will Help You Create and Execute Breakthrough Ideas."

Marcus Buckingham, founder of TMBC and author of "StandOut."

Paul Polman, CEO of Unilever.

Daniel Gross, columnist and economics editor for Yahoo! Finance and author of "Better, Stronger, Faster: The Myth of American Decline . . . and the Rise of a New Economy."

Ian Bremmer, president of Eurasia Group and author of "Every Nation for Itself: Winners and Losers in a G-Zero World."

Doc Searls, alumnus fellow at the Berkman Center for Internet & Society at Harvard University and author of "The Intention Economy."

Ken Favaro, senior partner at Booz & Company and coauthor of the HBR article "Creating an Organic Growth Machine."

Christiane Amanpour, renowned war correspondent and news anchor.