Sobre a natureza humana II

Jane Goodall: An Extraordinary Life

Through the years her work continued to yield surprising insights, such as the unsettling discovery that chimpanzees engage in a primitive form of brutal “warfare.” In early 1974, a "four-year war" began at Gombe, the first record of long-term warfare in nonhuman primates. Members of the Kasakela group systematically annihilated members of the "Kahama" splinter group.