A chimpanzee can sharpen a living branch into a spear—and use it to hunt. That weapon opens a darker portrait of a society ruled by alliances, debt, deception, and calculated violence. At Fongoli, females and adolescents used spears to reach bushbabies, while males coordinated hunts and traded meat for political support. Across Gombe, Ngogo, and Kanyawara, grooming can buy loyalty, coalitions can turn lethal, and patrols can target infants. Jane Goodall’s Goliath and Frans de Waal’s Chimpanzee Politics reveal why chimpanzee behavior feels disturbingly familiar. Even captivity adds a warning: chimps raised as human children can become dangerous.