Killing neighbours and taking over their lands led to a baby boom for a chimpanzee community in Uganda — potentially showing why it can be advantageous for chimps to start wars.
Chimpanzees (Pan troglodytes) have long been known for violent conflict or "warfare." It was first documented by English primate researcher Jane Goodall, who in 1974 observed the chimpanzee community in Gombe National Park in Tanzania splinter into two warring groups, leading to a four-year battle that resulted in the deaths of all the males in one group. But why the animals persisted with the violence for so long wasn't clear.
