Simon Doonan

Author, SLATE columnist Creative Ambassador for Barneys New York

Somaly Mam

Survivor & Anti-Sex Slavery Activist

Sophia Nelson

Award-winning Author & Journalist; On-Air Commentator for CNN

Spencer Wells

Geneticist, Anthropologist, Author, Entrepreneur, Adjunct professor at the University of Texas at Austin

Stacey Bess

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

Stephen Walt

Robert and Renee Belfer Professor of International Affairs at Harvard University

Stephen M. Walt | Realism & Balance of Threat | GREAT MINDS

Steve Grand

Country Music Artist, Acclaimed as the First Openly Gay Male Country Singer

Steven Brill

Award-Winning Journalist and Author

Steven Squyres

Scientific Investigator, NASA

Tal Ben-Shahar

Best-Selling Author & Positive Psychology Expert

Talib Kweli

Rapper, Emcee, Activist & Entrepreneur

Tara Sophia Mohr

Expert on Women’s Leadership and Well-Being; Author of "Playing Big: Find Your Voice, Your Mission, Your Message"

Tavi Gevinson

Creator of Fashion Blog Style Rookie and Rookie Magazine; Actress and Singer in the Broadway Show "This Is Our Youth"

The Winklevoss Twins

Entrepreneurs, Investors & Bitcoin Experts

Thomas Frey

Leading Visionary, Futurist & Executive Director of the DaVinci Institute

Tiffany Shlain

Founder of The Webby Awards; Emmy-Nominated Filmmaker, Bestselling Author, Internet Pioneer & Futurist

Tim O'Brien

Pulitzer Prize Winning Novelist for "The Things They Carried"

Todd Henry

Founder of Accidental Creative, Author of "The Accidental Creative," "Die Empty" & "Louder than Words"

Tom Rath

NYT Bestselling Author of StrenghtsFinder 2.0, Strengths Based Leadership & How Full is Your Bucket

Tonya Pinkins

Actress