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

Brad Meltzer

Host of History Channel’s "Lost History" & "Brad Meltzer’s Decoded;" New York Times Best-Selling Author

Danny Glover

Acclaimed Actor, Producer & Leading Social Activist

Ralph Nader

Consumer Advocate, Lawyer & Author; Former Independent Presidential Candidate

Graham Hill

Founder of Life Edited & TreeHugger.com

Raj Patel

Award-Winning Writer, Food Politics Activist, Filmmaker & Academic

Kathy Kaehler

Celebrity Trainer & Lifestyle Expert

Dean Karlan

Behavioral Economist, Social Entrepreneur & Author

Ira Flatow

NPR Science Correspondent, Host of "Science Friday;" Science Media Expert

Dr. Samantha Nutt

Medical Doctor, Award-Winning Humanitarian, Bestselling Author & Founder of War Child USA

George P. Bush

Politician & Land Commissioner of Texas

Dr. Marc Lamont Hill

Presidential Professor at CUNY Graduate Center, BET News Correspondent, Human Rights Activist & Author

Rachel Simmons

Internationally Recognized Educator & Best-Selling Author

Stacey Bess

Award-Winning Educator; Keynote Speaker; Advocate for Homeless Youth

Joseph P. Kennedy II

Former Member of the U.S. House of Representatives & Founder of Citizens Energy Corporation

Somaly Mam

Survivor & Anti-Sex Slavery Activist

Apolo Ohno

Eight-Time Olympic Medalist, Top Short-Track Skater in the United States & NYT Best Selling Author

Hard Pivot: Embrace Change. Find Purpose. Show Up Fully.

Kimberley Locke

Singer / Television Personality

Rye Barcott

Co-Founder & CEO of With Honor, Veteran and Author of "It Happened on the Way to War"