Conservationist Paul Rosolie recounts his extraordinary first contact with an uncontacted Amazonian tribe—a thousand-year encounter that revealed desperate people fighting for survival against loggers, narco traffickers, and deforestation. After 20 years protecting a remote Peruvian river basin, Rosolie witnessed armed warriors emerge from the jungle seeking food, rope, and answers about who the "good guys" were. His journey from an 18-year-old adventurer to director of Jungle Keepers reveals how intentional discomfort transforms purpose. The anterior mid-cingulate cortex—the brain's "muscle for doing hard things"—grows larger in people who intentionally endure discomfort, and younger generations raised on doom-scrolling have smaller ones than previous generations.