Caroline Casey

Founder of Kanchi & The Ability Awards

Bunker Roy

Founder of Barefoot College

Karen Tse

Human Rights Defender & Social Entrepreneur; Founder of International Bridges of Justice

Rebecca MacKinnon

Founding Director of Ranking Digital Rights

Katrina Markoff

Founder & CEO, Vosges Haut-Chocolat

Pastor Rick Warren

Pastor & Author of "The Purpose-Driven Life"

Sara Schoen

Social Critic and Sustainability Champion

Peter Thiel

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

Gerry Adams

President, Sinn Fein

John Zogby

Trendspotter & Leading Pollster

Tina Marie Jones

Business Consultant, Strategic Interventionist & Host of Holistic Living Talk Show

Sharon Lechter

Business Mentor, Financial Literacy Activist, Motivational Speaker, & Author, Known for "Rich Dad, Poor Dad"

Spencer Wells

Geneticist, Anthropologist, Author, Entrepreneur, Adjunct professor at the University of Texas at Austin

Emily Oster

Professor of Economics at Brown University; Author on Personal Finance & Family Planning

Rebecca D. Costa

Sociobiologist & Author of The Watchman's Rattle

Sandra Taylor

CEO of Sustainable Business International; ESG/Sustainability Expert & Author

Tiffany Shlain

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

James Woolsey

Former Director of the C.I.A.

Melinda French Gates

Co-Chair of the Bill & Melinda Gates Foundation

Melinda French Gates' Brief But Spectacular take on making birth ...

John Izzo, PhD

Leadership Expert & Bestselling Author

Clay Shirky

Expert on New Technology & Social Media, & How They Shape Culture; Professor & Distinguished Writer in Residence, NYU

Jimmy Wales

Founder of Wikipedia & Wikitribune

Kishore Mahbubani

Distinguished Fellow, Asia Research Institute at the National University of Singapore; Former Diplomat, Academic & Author

Graham Hill

Founder of Life Edited & TreeHugger.com

Roxanne Joyal

CEO of Me to We and a founding member of Free The Children

Laura Fitton

Founder & Climate Economy Evangelist at Enough.co; HubSpot, Founder of oneforty.com; co-author Twitter for Dummies

Doc Hendley

Global Humanitarian, Clean Water Crusader, Top 10 CNN Hero, Sustainability Advocate

Dr. James Wetherbe

Information Technology Expert, Ranked by "Information Week" as One of the Top Dozen Consultants & Lecturers on Management & Information Technology

Mike Walsh

CEO of Tomorrow, Futurist & Best-Selling Author of "The Algorithmic Leader"

Calvin Trillin

Author, Columnist, Humorist & Political Satirist