Annette Gordon-Reed

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

Alison Gopnik

Professor & World Leader in Children's Learning and Development

Dalia Mogahed

President and CEO, Mogahed Consulting, LLC; Author, "Who Speaks for Islam?"

Naomi Wolf

Bestselling Author; Social Activist; Former Political Advisor to Al Gore and Bill Clinton

Gerry Adams

President, Sinn Fein

Pardis Sabeti

Infectious Disease Expert & Professor at Harvard University

George Kohlrieser

Organizational, Clinical & Police Psychologist; Former Hostage Negotiator

James Traub

Global Affairs & Politics Writer

Dr. Afiya Fredericks

Assistant Professor of Psychology at the University of the District of Columbia; Growth Mindset Expert

Carl Pope

Senior Advisor to UN Envoy for Cities and Climate; Former CEO and Chairman of the Sierra Club

Daniel Dennett

Professor of Philosophy at Tufts University

Sharon Gannon

Co-Founder, Jivamukti Yoga

Lisa Randall

Award-Winning Physicist & Author

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

George Rupp

President & CEO, International Rescue Committee

Michael Walzer

Professor Emeritus, The Institute for Advanced Study

Robert Lacey

Author, "The Kingdom"

Irwin Kula

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

David M. Kennedy

Pulitzer Prize-Winning Historian & Donald J. McLachlan Professor of History Emeritus at Stanford University

Nicholas Lemann

Dean, Columbia Univ. School of Journalism

Alan Weisman

Journalist / Author