As America continues to grapple with political uncertainty and an uneasy relationship with the planet, the author and environmentalist makes the case for an expansive and inclusive grassroots movement. McKibben, who wrote the first book on climate change for a general audience in 1989 and later founded the international climate campaign 350.org with a small group of college students, has lately been focused on growing Third Act, a nonprofit that organizes people over the age of 60 to take action on climate change. In this special episode, we share McKibben’s recent live talk from the 2023 Mountainfilm Festival in Telluride, Colorado, in which he discusses lessons learned in decades of environmental activism and where the climate movement goes from here.The Outside Podcast is made possible by Outside+ subscribers. Learn about the many benefits of a subscription and sign up now at outsideonline.com/podplus.