Robert Lacey

Author, "The Kingdom"

Nancy Sherman

Philosopher and Author, “The Untold War”

Paul Rieckhoff

Founder and Executive Director of Iraq and Afghanistan Veterans of America (IAVA); Author, "Chasing Ghosts: Failures and Facades in Iraq"

Jason Kottke

Designer of Silkscreen Typeface, Lifetime Achievement Award Blogger

Lisa Witter

Partner and Chief Change Officer, Fenton

Interview Lisa Witter (English)

Raj Patel

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

Dr. Paul Wolpe

Director of the Emory Center for Ethics

Noam Chomsky

Professor of Linguistics and Philosophy at MIT & Foreign Policy Author

Clay Shirky

Expert on New Technology & Social Media, & How They Shape Culture; Professor & Distinguished Writer in Residence, NYU

Pardis Sabeti

Infectious Disease Expert & Professor at Harvard University

Sebastian Copeland

Adventurer, Environmental Activist, Award-Winning Photographer, Author, Lecturer & Founder of the Sedna Foundation

Andrew Sullivan

Writer-at-large at New York; Former Editor-in-Chief of The New Republic Magazine & Political Blogger

Sherman Alexie

Poet, Short Story Writer, Novelist, and Performer

Tom Freston

Principal, Firefly3; Former CEO, Viacom Inc.

Adam Platt

Restaurant Critic, New York Magazine

Jeffrey Archer

Former UK Member of Parliament; Author

Ira Byock

Dartmouth-Hitchcock Medical Center

Matthew C. Nisbet

Professor of Communication, American University

Leif Pagrotsky

Member of Parliament, Sweden

Melissa Franklin

Professor of Physics, Harvard University

Jason Christopher Hartley

Infantryman, New York Army National Guard

Marvin Zuckerman

Professor Emeritus, University of Delaware

Leon Botstein

President, Bard College & Music Director, American Symphony Orchestra

Baratunde Thurston

Futurist Comedian, Writer & Cultural Critic

Baratunde In Media

Robert Greene

New York Times Bestselling Author of "The 48 Laws of Power," "The Art of Seduction," "The 33 Strategies of War," and "The 50th Law"

Irwin Kula

Irwin does challenge the status quo in the American spiritual landscape.

Gerry Adams

President, Sinn Fein

Lawrence Summers

Professor & Former President of Harvard University; Former Secretary of the Treasury, Director of the National Economic Council, & Chief Economist of the World Bank

Matt Miller

Fortune Columnist, Author & Radio Host

Ricky Gervais

Award-Winning English Comedian & Actor; Known for "The Office" and "Extras"