Peter Gleick

Co-founder & President of the Pacific Institute for Studies in Development, Environment & Security

The Three Ages of Water

Mary Lambert

Singer-Songwriter; known for her work on Macklemore's "Same Love"

Tiffany Shlain

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

Norman Ornstein

Bestselling Author, Political Analyst & Resident Scholar at the American Enterprise Institute

Marc Brown

Children's Book Author; Creator of "Arthur"; Advote for Children's Literacy

Ben Bailey

Stand-up comedian and Host of "Cash Cab"

Marlee Matlin

Academy Award Winning Actress; Healthcare Advocate & Disability Rights Activist Fighting for Better Access for the Deaf

G. Garvin

Celebrity Chef & Host of 'Roadtrip with G. Garvin' on The Cooking Channel

Aaron Koblin

Co-Founder & President at Supernatural & Within; Former Leader of the Data Arts Team at Google

Vali Nasr

Professor of International Affairs & Middle East Studies at Johns Hopkins University

Islamic Leviathan: Islam and the Making of State Power (Religion and Global Politics)

Cam Marston

Workforce Dynamics Consultant; President & Founder of Generational Insights

Kay Robertson

Star, A&E's "Duck Dynasty" & Author of "Miss Kay's Duck Commander Kitchen"

Diane Rehm

Radio Talk-Show Host

Richard Besser

President & CEO of the Robert Wood Johnson Foundation; Former Chief Health & Medical Editor for ABC News

Lidia Bastianich

Celebrity Chef, Author, Host of "Lidia's Kitchen"

Philippe Petit

Motivational Speaker & High Wire Artist

Cameron Sinclair

World-Class Visionary; Co-Founder of Architecture for Humanity

Chelsie Hightower

Professional Ballroom Dancer; Known for "Dancing With the Stars" and "So You Think You Can Dance"

Laurie Holden

Actress Known For AMC's "The Walking Dead;" Human Rights Activist

Catherine Crier

Acclaimed Author, Former Judge, Award-Winning Journalist & Television Broadcaster

Michelle Bernard

Political Analyst, MSNBC and Founder, The Bernard Center for Women, Politics & Public Policy

Matthew Luhn

Former Pixar Animator, Story Artist, Creativity Expert & Author

Clarence B. Jones

Former Adviser & Speechwriter for Martin Luther King Jr.

Theaster Gates

Director of Arts and Public Life at the University of Chicago; Founder & President of Rebuild Foundation

Dr. Marc Lamont Hill

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

Lisa Randall

Award-Winning Physicist & Author

Dark Matter and the Dinosaurs: The Astounding Interconnectedness of the Universe

David Rosengarten

Chef & TV Personality; Author of Award-winning Cookbook "It's All American Food"

Tommy Spaulding

Former President & CEO of Up with People, World-Renowned Leadership Speaker & Author of "It's Not Just Who You Know"

John Besh

Chef/Owner, Besh Restaurant Group; Best-Selling Author; TV Host; James Beard Award for Best Chef of the Southeast in 2006

Drew Gilpin Faust

President of Harvard University