I want to thank a number of people who contributed to this book in different ways. First of all, I owe my mother, Joyce Johnson, a profound debt of gratitude for her editorial help. I’m amazed that I continue to learn so much from her at this late stage. I am grateful to Phil Jourdan, my editor at Watkins, whose contribution was invaluable. I also want to thank Jo Lal, the publisher of Watkins, for her care and attention. I owe a debt of gratitude to many people who worked with me at the Center for Planetary Culture, a think-tank I started. Together, we developed a Regenerative Society Wiki that provided some of the technical ideas for this book. People who contributed include Paula Santa Rosa, Ashley Taylor, David Morgan, Rachel Shearer, Mark Chasan, Ester Kim, Ryan Patrick, Harper Cowen, Rachel Wong and Jessie Brinton. I would also like to thank my managers, Jonny and Alison Podell, for their help, and my agent Bill Gladstone. I deeply appreciate the input and encouragement from friends who read various drafts of this and offered comments and suggestions, including David Sauvage, Alnoor Ladha, Ryan Wartena, Schuyler Brown and Mitch Mignano. I also appreciate other forms of help and support I received from Bob Eisenberg, Laura Hoffmann and Luke Weil. I also want to thank my supporters on Patreon.