Alice Walker

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

Jason Gots

Editor, Big Think

Mandy Patinkin

Actor Best Known for "Homeland," "Criminal Minds" and "The Princess Bride"

Drew Houston

Co-Founder & CEO of Dropbox

Tim O'Reilly

Founder & CEO of O'Reilly Media

Franklin Graham

President & CEO of the Billy Graham Evangelistic Association, Christian Evangelist & Missionary

John P. Kotter

Leadership & Change Management Guru

Kevin O'connor

Professional Speaker, Teacher, Coach & Author for Medical and Technical Leaders

Craig Kielburger

Co-Founder of the WE Organization, Social Entrepreneur, Humanitarian & New York Times Best-Selling Author

Trevor Noah

Emmy Award-Winning Comedian & Bestselling Author; Former Host of "The Daily Show"

Hope Solo

Former Professional Soccer Goalkeeper; Two-Time Olympic Gold Medalist & World Cup Champion

Jon Lajoie

Comedian, Actor, Musician & Internet Celebrity

Dr. Marc Lamont Hill

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

Drew Gilpin Faust

President of Harvard University

Peter Dinklage

Emmy Award-Winning Actor, Known for his Role on "Game of Thrones"

Serena Williams

Iconic Professional Tennis Player & Olympic Gold Medalist; Activist, Philanthropist & Entrepreneur

Rachel Simmons

Internationally Recognized Educator & Best-Selling Author

Blaise Agüera y Arcas

Leading AI Researcher, Works on Machine Intelligence at Google; Former Architect of Bing Maps and Bing Mobile

Ubi Sunt

Immaculée Ilibagiza

Author, "Left to Tell: Discovering God Amidst the Rwandan Holocaust"

Paula Poundstone

Stand-Up Comedian, Television Personality and Panelist on NPR's "Wait Wait...Don't Tell Me"