Tim Tebow

ESPN College Football Analyst; Heisman Trophy Winner; Former Quarterback for NFL's Denver Broncos & Baseball Outfielder for the New York Mets

Jonathan Bush

Technology Entrepreneur; Co-Founder & Former CEO of athenahealth

Dr. Dean Ornish

Physician, Leading Researcher in Healthcare, Founder of the Preventive Medicine Research Institute & Bestselling Author

Everyday Cooking with Janet Fletcher, Jean-Marc Fullsack and Helen Roe

Tonya Lewis Lee

Author, Producer, Filmmaker & Entrepreneur; Women's Health Activist

Nicholas Burns

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

Joy-Ann Reid

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

Lynsey Addario

Award-Winning Photojournalist; Contributor for National Geographic & Time Magazine

Of Love & War

Nicholas Christakis

Sol Goldman Family Professor of Social & Natural Science; Director of the Human Nature Lab; Co-Director of the Yale Institute for Network Science

Tim O'Reilly

Founder & CEO of O'Reilly Media

James Watson

Molecular Biologist, Geneticist & Zoologist

Craig Venter

Founder & CEO of Synthetic Genomics Inc.

David Nico

Well-Being Expert, Author of "Diet Diagnosis," Holistic Nutrition & Health Strategist

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

John Zogby

Trendspotter & Leading Pollster

Juan Williams

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

Rudolph E. Tanzi

Alzheimer's Disease Researcher; Professor of Neurology at Harvard Medical School & Expert on the Genetics of Neurological Disease

The Healing Self: A Revolutionary New Plan to Supercharge Your Immunity and Stay Well f...

Mark Kramer

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

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

Christopher Gavigan

Founder & Chief Product Officer, The Honest Company

Bernard Kouchner

Former Minister of Health of France; Founder of Nobel Peace Prize-Winning Médecins Sans Frontières