Marc Kielburger

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

Raj Patel

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

Neil Giuliano

Gay Rights Activist & President and CEO of Greater Pheonix Leadership

Bobby Seale

Political Activist & Co-Founder of the Black Panther Party

Slavoj Žižek

Philosopher & International Director of the Birkbeck Institute for the Humanities

Tim O'Brien

Pulitzer Prize Winning Novelist for "The Things They Carried"

Kenneth Roth

Executive Director at Human Rights Watch

Sherman Alexie

Poet, Short Story Writer, Novelist, and Performer

Nadine Strossen

Professor of Law; President, American Civil Liberties Union (1991-2008)

Jim Wallis

Theologian, Writer, Political Activist & Racial Justice Advocate

Christ in Crisis: Why We Need to Reclaim Jesus

Gary Hirshberg

Co-Founder & Chief Organic Optimist of Stonyfield Farm

David Bellos

Translator

Rose McGowan

Writer, Actor, Director, Entrepreneur and Whistle-Blower

Paul Rieckhoff

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

Sister Souljah

Author, Rap Artist & Community Activist

Maude Barlow

Activist, Author & Former UN Senior Advisor on Water

Ira Byock

Dartmouth-Hitchcock Medical Center

Bill Hybels

Senior Pastor of Willow Creek Community Church

Helen Clark

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

Jeffrey Israel

Author & Jewish Studies Professor at Williams College