Jeremy Grantham

Co-founder and Chief Investment Strategist GMO LLC

John McCain

Republican U.S. Senator, Arizona; 2008 Presidential Nominee

Faith of My Fathers: A Family Memoir

Dave Gilboa

Co-Founder & Co-CEO of Warby Parker

Sir Richard Branson

Founder of Virgin Group

Finding My Virginity: The New Autobiography

Archbishop Desmond Tutu

Nobel Laureate & Human Rights Activist

Tim Brown

Tim Brown is the CEO of IDEO, a Global Design and Innovation Consulting Firm

Kimbal Musk

Entrepreneur, Venture Capitalist & Environmentalist; Co-Founder of The Kitchen Community; Brother of Elon Musk

John Mackey

Co-Founder & CEO, Whole Foods Market

Robert Ballard

Renowned Ocean Explorer and Scientist

Aziza Chaouni

Moroccan Civil Engineer and Architect Creating Sustainable, Built Environments in the Developing World

Richard Florida

Renowned Economist & Author of "The Rise of the Creative Class"

Carl Pope

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

Tom Steyer

California Business Leader, Philanthropist and Clean Energy Advocate

Kate Brandt

Lead for Sustainability at Google & Former Chief Sustainability Officer for the Obama Administration

Rick Ridgeway

Patagonia's Vice President of Environmental Initiatives & Supply Chain Partnerships

Amber Jenkins

Editor of NASA's Global Climate Change Website and Project Manager & Research Consultant for JPL's Center for Climate Sciences

Sarah Stein Greenberg

Executive Director of the Hasso Plattner Institute of Design at Stanford University

Design Think Your Life - YouTube

Dr. Michio Kaku

World-Renowned Theoretical Physicist

Dr. Kaku Interview - Think 2018 - YouTube

Ray Kurzweil

Chairman of Kurzweil Technologies; Inventor; Futurist

Brigitta Witt

Vice President, Environmental Affairs Global Hyatt Corporation.