Lena Dunham

Writer, Director, Actor & Producer Best Known for HBO’s “Girls”

Sarah Silverman

Stand-Up Comedian, Actress, Singer, Producer & Writer

Bill Clinton

42nd President of the United States; Founder of the William J. Clinton Foundation

Jonathan Bush

Technology Entrepreneur; Co-Founder & Former CEO of athenahealth

Tim O'Reilly

Founder & CEO of O'Reilly Media

Dr. Dean Ornish

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

Christiane Northrup

Authority on Women's Health, Bestselling Author of "Goddesses Never Age"

Tonya Lewis Lee

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

Tonya Lewis Lee on the Black maternal mortality crisis

James Watson

Molecular Biologist, Geneticist & Zoologist

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

Craig Venter

Founder & CEO of Synthetic Genomics Inc.

Damon Wayans, Sr.

Actor & Comedian

Bob Greene

Exercise Guru & Best-Selling Author

Michelle Gielan

Former National CBS News Anchor Turned Positive Psychology Researcher; Bestselling Author of "Broadcasting Happiness"

David Nico

Author, Health Strategist & Leadership Well-Being Expert

Nico sample clip

Bakari Sellers

Author, Attorney, Political Commentator & Youngest African American Elected Official in the U.S.

Christopher Gavigan

Founder & Chief Product Officer, The Honest Company

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

David Allen

Bestselling Author & Founder of The David Allen Company

Juan Williams

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

Ben Goldacre

Physician; Best-Selling Academic & Science Writer

John Zogby

Trendspotter & Leading Pollster

Rudolph E. Tanzi

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

Marianne Williamson

Renowned Authority on Spirituality & Metaphysics; Author of "Everyday Grace;" 2024 Democratic Presidential Candidate

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

Dr. William H. Frist - Acceptance Speech

Blair Underwood

Award-Winning Actor & Producer

Chris Matthews

Former Host, Hardball with Chris Matthews, MSNBC

Bernard Kouchner

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

Dr. M. Joycelyn Elders

Former Surgeon General of the United States

Tracy Anderson

Fitness Pioneer, Entrepreneur & Author, Founder of The Tracy Anderson Method

Tracy Anderson shares moves to work your whole body