Slavoj Žižek

Philosopher & International Director of the Birkbeck Institute for the Humanities

Richard Wolffe

Digital Executive, Best-Selling Author & Columnist at The Guardian

President's Speaker Series - YouTube

Tiffany Shlain

Founder of The Webby Awards; Emmy-Nominated Filmmaker, Bestselling Author, Internet Pioneer & Futurist

Raj Patel

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

Laura Liswood

Secretary General, Council of Women World Leaders; Senior Advisor, Goldman Sachs

Jim Wallis

Theologian, Writer, Political Activist & Racial Justice Advocate

Christ in Crisis: Why We Need to Reclaim Jesus

Scott Aughenbaugh

Strategic Engagement Director at the National Security Innovation Network

Calvin Trillin

Author, Columnist, Humorist & Political Satirist

Kenneth Roth

Executive Director at Human Rights Watch

John Prendergast

Human Rights Advocate and Author of Unlikely Brothers

David Bellos

Translator

Marina Adshade

Author of "Dollars and Sex: How Economics Influences Sex and Love"

Dr. Samantha Nutt

Medical Doctor, Award-Winning Humanitarian, Bestselling Author & Founder of War Child USA

Yves Rossy

Military-Trained Pilot & Aviation Enthusiast

Todd Kuiken

Biomedical Engineering Manager at the Rehabilitation Institute of Chicago

Justin Hall-Tipping

The Energy Evangelist, Justin Hall-Tipping works on nano-energy startups -- mastering the electron to create power.

Anna Dietrich

‎Entrepreneur; Consultant; Speaker; COO & Co-Founder of Terrafugia, Inc.

Andrew Cohen

Founder, EnlightenNext

Virginia Postrel

Author & Columnist; Writes on The Intersection of Commerce & Culture

Ahmed Shihab-Eldin

Emmy-Nominated Journalist; Correspondent & Producer at VICE Media, LLC

Coleman Peterson

Former Executive Vice President, Wal-Mart. President/CEO of Hollis Enterprises, LLC

James A. Joseph

Former Ambassador to South Africa; Leader in Residence, Hart Leadership Program at Duke University

Immaculée Ilibagiza

Author, "Left to Tell: Discovering God Amidst the Rwandan Holocaust"

Yochi Dreazen

Deputy Managing Editor & Foreign Editor of Vox; Author of "The Invisible Front: Love and Loss in an Era of Endless War"

Jack Perkowski

Managing Partner, JFP Holdings Ltd., Founder, ASIMCO Technologies and Author, Managing the Dragon

Rose Mapendo

Humanitarian / Activist / Congolese Genocide Survivor

Sarah O. Ladislaw

Former Managing Director at Rocky Mountain Institute (RMI)

Dean Karlan

Behavioral Economist, Social Entrepreneur & Author

Larraine Segil

Global Business Consultant

Maria Conchita Alonso

Singer-Songwriter; Latin Actress; LGBT Rights Activist