Andreas M. Antonopoulos

Security & Distributed Systems Expert, Coder, Entrepreneur & Author

Dr. Peter Vogel

Peter Vogel Strategy Consulting, The Entrepreneurs' Ship

Avi Rubin

Professor of Computer Science & Technical Director of the Information Security Institute at Johns Hopkins University

Timothy Bartik

The author of "Investing in Kids," Timothy Bartik studies state and local economies -- and analyzes the benefits of preschool as an economic development program.

James Citrin

Partner, Spencer Stuart & Author on Leadership and Career Success

Greg McKeown

CEO of THIS Inc., Social Innovator & NYT Best-Selling Author of "Essentialism: The Disciplined Pursuit of Less"

Greg McKeown on Striking a Problem at the Root

Umair Haque

Director of Havas Media Labs and Blogger for the Harvard Business Review

Ed Gavagan

Owner of PraxisNYC

Peter Zeihan

Energy & Geopolitical Strategist, Author of "The Absent Superpower" & "The Accidental Superpower"

Ben Horowitz

Co-founder of Andreessen Horowitz, Author, Tech Investor

Paul Polman

Former CEO of Unilever, Sustainability Leader, UN Global Compact Chair

Alberto Alesina

Professor of Political Economy at Harvard University, Author & Lecturer

Dr. Bill Conerly

Economist & Future Forecaster

Timothy Keiningham

Marketing and linking service

David Madland

Managing Director, "American Progress;" Director, "American Worker Project;" Author, "Hollowed Out"

Evan Davis

Presenter BBC Radio 4 Today Programme

Rick Ridgeway

Environmentalist, Mountaineer, Expedition Author, Former VP of Environmental Initiatives & Special Projects at Patagonia

Dean Karlan

Economics Professor, Poverty Alleviation Expert, Nonprofit Founder

Bob Iger

CEO of Walt Disney Co.

Ryan Blair

Successful Entrepreneur & Author of "Nothing To Lose, Everything to Gain"

Fred Hassan

Chairman of Baush + Lomb and author of "Reinvent: A Leader's Playbook for Serial Success"

James Traub

Global Affairs & Politics Writer

Brandon Adams

Professional Poker Player and Self-Published Author

Dwayne Spradlin

President and CEO, InnoCentive, Inc.

Tal Ben-Shahar

Author, Positive Psychology Expert, Happiness Studies Pioneer

Short Cuts to Happiness: Life-Changing Lessons from My Barber

Jeff Swartz

Former President and CEO, Timberland

Ian Reisner

Co-Founder, Parkview Developers

Michael Mauboussin

Wall Street Investment Strategist & Head of Global Financial Strategies at Credit Suisse

Larry Diamond

Senior Fellow at the Hoover Institution & the Freeman Spogli Institute for International Studies; Author & Democracy Expert

Brian Robertson

Co-Founder at HolacracyOne