Greg McKeown

CEO of THIS Inc. & Best-Selling Author of "Essentialism: The Disciplined Pursuit of Less"

David Suzuki

Environmentalist & Scientist; Co-Founder of the David Suzuki Foundation

Rachel Simmons

Internationally Recognized Educator & Best-Selling Author

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Bjorn Lomborg

Political Scientist & Author of "The Skeptical Environmentalist"

Nicholas Sparks

International Bestselling Novelist & Screenwriter, Known for "The Notebook"

Juan Williams

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

James Patterson

NY Times Best-Selling Author & Reading Champion

John Zogby

Trendspotter & Leading Pollster

Kip Thorne

Nobel Prize Winning Theoretical Physicist & Author, "The Science of Interstellar"

Alice Walker

Pulitzer Prize & National Book Award-Winning Author; Best Known for "The Color Purple"

Elizabeth Cohen

Senior Correspondent for the CNN Health, Medical, & Wellness Unit

Elizabeth Cohen - CNN news story on baby formula shortage

James Watson

Molecular Biologist, Geneticist & Zoologist

Amy DuBois Barnett

Chief Content Officer, theGrio.com & EVP Digital, Entertainment Studios

Robert D. Kaplan

Best-Selling Author & Atlantic Monthly Correspondent

Denise Austin

Fitness Expert, Author & Video Hall of Famer