Senior Adviser to UN Envoy for Cities and Climate; Former CEO and Chairman of the Sierra Club

Fashion Designer

Author; Decision Strategist; Former Professional Poker Player

Activist; Storyteller from Sierra Leone; Author, "A Long Way Gone"

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

Best-Selling Author & Positive Psychology Expert

Director, Ranking Digital Rights, New America

Provocative Public Intellectual & Groundbreaking Author

Senior Writer, Former Deputy Bureau Chief, Wall Street Journal

Ex-VP of Data at Spotify; Founder of Seed; Founder of an AI startup, Stealth

Wall Street Journal Columnist; Ezra K. Zilkha Chair and Senior Fellow for Governance Studies at The Brookings Institution

Musician, DJ, Photographer

World-Renowned Futurist & Theoretical Physicist

Nobel Peace Prize Laureate & Founder of Grameen Bank

Academy Award Winning Filmmaker & Author; Best Known for "Shape Of Water," "Pacific Rim," Pan's Labyrinth," and "Hellboy"

Professor of American Legal History at Harvard Law School & Pulitzer Prize-Winning Author

Partner and Chief Change Officer, Fenton

Designer of Silkscreen Typeface, Lifetime Achievement Award Blogger

Author / Filmmaker

Award-Winning Writer, Activist & Academic