Joseph Stiglitz

Nobel Prize Winner; American Economist; Professor at Columbia University

What's happening in the United States?

Tom Colicchio

Celebrity Chef & Owner of Crafted Hospitality; Head Judge on "Top Chef" & Host of the "Citizen Chef" Podcast

Xiuhtezcatl Martinez

Indigenous Climate & Community Activist; Hip-Hop Artist; Author of "Imaginary Borders"

Voice Runners: Rapping to Save Our Future | Xiuhtezcatl Martinez

Mark Ruffalo

Golden Globe-Winning Actor, Director, Screenwriter & Environmental Activist

Pia Heidenmark Cook

Sustainability & Business Transformation Expert; Former CSO of Ingka Group (IKEA)

Tensie Whelan

Director of NYU's Center for Sustainable Business; Former President of the Rainforest Alliance

Katharine Hayhoe

Atmospheric Scientist, Professor of Political Science & Director of Climate Science Center at Texas Tech, Chief Scientist with The Nature Conservancy

Amin Toufani

CEO of T Labs, Creator of Adaptability.org, Chair for Finance & Economics at Singularity University

Geoff Colvin

Senior Editor-at-Large at Fortune & Bestselling Author

Geoff Colvin Speaker Reel

Joan Michelson

Co-Host of the Electric Ladies Podcast, ESG Consultant, Business Sustainability & Leadership Expert

Michael Shellenberger

Founder & President of Environmental Progress; Expert on Energy, Climate, Security, Human Development & Politics

Scott Amyx

Technology Futurist & Sustainability Venture Capitalist Backing Social Impact Entrepreneurs; Managing Partner at Astor Perkins

Jeremy Rifkin

Economic & Social Theorist; Futurist; Authority on World Economic & Environmental Trends; Environmental Activist; Bestselling Author

The Age of Resilience: Reimagining Existence on a Rewilding Earth

Jacqueline Novogratz

Founder & CEO of Acumen Fund

Alex Honnold

"Free Solo" Professional Rock Climber, Environmental Advocate & Host of the "Climbing Gold" Podcast

My Favorite Rock Climber - Alex Honnold | Tosh Show

Beyoncé Knowles-Carter

R&B and Pop Singer-Songwriter, Actress & Cultural Icon; Most Recently Known for "Cowboy Carter"

Alexis Ohanian

Co-Founder of Initialized Capital & Co-Founder of Reddit; Entrepreneur, Investor, Activist & Bestselling Author

Kehkashan Basu

Founder & President, Green Hope Foundation; Forbes 30 Under 30, United Nations Human Rights Champion & National Geographic Young Explorer

Jason Clay

Senior Vice President of Food & Markets at WWF

Don Cheadle

Actor, Activist & Author; Known for "Iron Man 2" & "Hotel Rwanda"

ACE Universe Presents: A Conversation with Don Cheadle - YouTube