Alex Epstein interviews Joakim Book, an up-and-coming economic and environmental commentator.These days Book is writing articles challenging climate catastrophism and explaining the value of abundant energy use.But he used to be a climate activist who thought he was saving the planet from the evil of fossil fuels.Epstein and Book cover: Book’s time as a climate activist. Why Book and others never questioned the rightness of opposing fossil fuels. How economic thinking changed Book’s perspective. How Book was influenced by The Moral Case for Fossil Fuels. What lessons we can learn about persuasion from Book’s experience.