David Bellos

Translator

Tim O'Brien

Pulitzer Prize Winning Novelist for "The Things They Carried"

Anuradha Koirala

Former Governor of Bagmati Province; Nepalese Social Activist

Neil Giuliano

Gay Rights Activist & President and CEO of Greater Pheonix Leadership

Ira Byock

Dartmouth-Hitchcock Medical Center

Paul Rieckhoff

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

Melissa Harris-Lacewell

Professor, Princeton University

Sister Souljah

Author, Rap Artist & Community Activist

Marc Kielburger

Co-Founder of the WE Organization, Social Entrepreneur, Humanitarian & New York Times Best-Selling Author

Helen Clark

Former Administrator of the United Nations Development Programme & Former Prime Minister of New Zealand

Bill Hybels

Senior Pastor of Willow Creek Community Church

Timothy Patrick McCarthy

Award-Winning Scholar, Educator & Human Rights Activist; Faculty Member at Harvard University's Graduate School of Education and John F. Kennedy School of Government

Reckoning with History: Unfinished Stories of American Freedom

Mark Kramer

Co-founder of FSG, Author & Co-Creator of Shared Value Concept

Dr. Marc Lamont Hill

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

An Phung

Multimedia Journalist

Danny Hillis

Author & Co-Founder and Co-Chairman of Applied Minds

Gary Slutkin

Epidemiologist & Founder/Executive Director of Cure Violence

Talib Kweli

Rapper, Emcee, Activist & Entrepreneur

Peter Rojas

Co-founder of Gizmodo and of Engadget

Ingrid Newkirk

President, PETA