Bill George

Senior Fellow at Harvard Business School, Best-Selling Leadership Author & Former CEO of Medtronic

Sir Richard Branson

Businessman & Founder of Virgin Group

Joanne Freeman

Professor of American History and of American Studies, Yale University

Gil Troy

American Historian

Samuel W. Mitcham, Jr.

Author & Historian

Jane Sherron De Hart

Political Historian & Author of "Ruth Bader Ginsburg: A Life"

Amy Herman

Founder & President of The Art of Perception, Author of "Visual Intelligence: Sharpen Your Perception, Change Your Life"

Mark Updegrove

Author; Historian; President & CEO of the LBJ Foundation

Lonnie G. Bunch

Secretary of the Smithsonian Institution

Kathryn S. Olmsted

Professor and Department Chair of the History Department at UC Davis, Author of "Right out of California: The 1930s and the Big Business Roots of Modern Conservatism"

Jay Winik

Bestselling Author and American Historian; Known for "April 1865: The Month That Saved America"

Kevin M. Kruse

Professor of History at Princeton University; Author of "One Nation Under God: How Corporate America Invented Christian America"

Todd Purdum

Senior writer at POLITICO and a contributing editor at Vanity Fair

Julie Nixon Eisenhower

Biographer & Historian

Jeffrey Rosen

President & CEO of the National Constitution Center & Contributing Editor of The Atlantic

Steve Coll

Former President & CEO of New America Foundation; Pulitzer Prize-Winning Author of "Ghost Wars"

Kenneth Roth

Executive Director at Human Rights Watch

Annette Gordon-Reed

Professor of American Legal History at Harvard Law School & Pulitzer Prize-Winning Author

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"

Edward Tenner

Smithsonian Institution Distinguished Scholar & Author of "Why Things Bite Back" and "Our Own Devices"

Craig Shirley

Author, Historian, and Lecturer

Bill O'Reilly

Host of "The O'Reilly Factor," Best-Selling Author & Syndicated News Columnist

Peter Thiel

Former CEO and Co-founder of PayPal; Technology Entrepreneur, Investor and Philanthropist

Larry Schweikart

Former Rock Drummer, Historian, Film Producer & Co-Author of "A Patriot's History of the United States"

Lisa Randall

Award-Winning Physicist & Author

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

Raj Patel

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

Noam Chomsky

Professor of Linguistics and Philosophy at MIT & Foreign Policy Author

Jimmy Wales

Founder of Wikipedia & Wikitribune

Kurt Andersen

Host of "Studio 360 from PRI and WNYC" & Author

Robert Ballard

Renowned Ocean Explorer & Scientist