A scientist solves the mystery of the only known chimpanzee civil war...thus far. In 1960, Louis Leakey sent Jane Goodall to start her study of chimpanzees at Gombe National Park, Tanzania. Her first decade of research led her to think that chimpanzees were like nicer versions of humans. But in the early 1970s, the Gombe chimp community split in two and deadly violence erupted. The cause has remained a mystery until now. A new study by Leakey Foundation grantee Joseph Feldblum reveals similarities between the ways chimpanzee and human societies break down. Thanks: Thanks to Joseph Feldblum for sharing his work. Visit his website to learn more about his research. Thanks to Jane Goodall for everything. Visit her website to learn more about her work and the Gombe chimpanzees. The archival audio used in this episode is from The Leakey Foundation Archive. The narration in the first part of our story was recorded in 1970 for a Leakey Foundation filmstrip. The lecture audio is from a 1978 Leakey Foundation lecture entitled "Cannibalism and Warfare in Chimpanzee Societies." The Leakey Foundation Origin Stories is a project of The Leakey Foundation, a nonprofit organization dedicated to funding human origins research and outreach. The Leakey Foundation funds cutting-edge research about human evolution and human behavior. Support this show and the science we talk about with a tax-deductible donation. Thanks to a generous supporter, your donation will automatically be quadrupled! Visit leakeyfoundation.org/originstorieschallenge to donate today! Credits Editor: Julia Barton Host and Series Producer: Meredith Johnson Associate Producer: Shuka Kalantari Sound Design: Katie McMurran Theme Music: Henry Nagle Additional Music: Lee Rosevere "Tech Toys"  Sponsors This season of Origin Stories is made possible by support from Dixon Long, Jeanne Newman, and Camilla Smith. Get Social We'd love to connect with you on Twitter and Facebook. Please say hi and let us know what you think of the show! If you like the show, please leave us a review or rating on Apple Podcasts. It's the best way to help other people find the show and we really appreciate it.