Erin Brockovich

Consumer Advocate, Author, TV Host & Environmental Activist

LeVar Burton

Literacy Advocate & Actor Known for "Roots," "Star Trek" & "Reading Rainbow"

Mae Jemison

First Black Woman in Space & Former NASA Astronaut; National Women's & International Space Hall of Famer Founder, 100 Year Starship

Marcus Buckingham

Peak Performance Expert, Best-Selling Author, Researcher & Strengths Revolutionist

Stephen Colbert

Host of "The Late Show with Stephen Colbert"

Stephanie Izard

Celebrity Chef, Author, Winner of "Top Chef" Season 4 & Partner of Three Award-Winning Chicago Restaurants

Tim Berners-Lee

Inventor of the World Wide Web; Engineer & Computer Scientist

Whoopi Goldberg

Award-Winning Actress, Comedian & Co-Host of ABC's "The View"

Chelsea Clinton

Vice Chair of the Clinton Foundation & Author of "She Persisted" Series

Chelsea Clinton on the Fight for Reproductive Health

Cheryl Burke

Professional Ballroom Dancer, Model, TV Host, Known for "Dancing with the Stars"

Robert Irvine

Celebrity Chef, Philanthropist & Author; Best Known for "Restaurant: Impossible"

Alex Guarnaschelli

Iron Chef and Food Network Personality

Margaret Cho

Grammy Award-Nominated Comedian; Actress, Author & LGBT Advocate

Margaret Cho: Remove Your Investment in Pain

Julián Castro

Former Democratic Candidate in the 2020 Presidential Race; Former Mayor of San Antonio & Former Secretary of Housing & Urban Development

Mike Birbiglia

Comedian, Actor & Writer; Known for "Orange is the New Black" & "Trainwreck"

Mohamed El-Erian

President at Queens'​ College, Cambridge; Former CEO and Co-Chief Investment Officer, Pacific Investment Management Co. (PIMCO); Author of the best-selling book "When Markets Collide"

Alan Dershowitz

Harvard Law School Professor; Leading Expert in Civil Rights

John Dickerson

News Anchor for "CBS News Prime Time with John Dickerson"

Tom Colicchio

Chef & Owner of Crafted Hospitality

Steve Forbes

Chairman & Editor-in-Chief of Forbes Media

Flat Tax Revolution: Using a Postcard to Abolish the IRS