*Frans de Waal notes, “All animals are competitive...There would obviously be no need for peacemaking if they lived in perfect harmony.” He acknowledges that bonobos sometimes catch and eat prey, but he points out this is feeding, not aggression. He cites a 2007 experiment in which apes were presented with a platform from which they could obtain food if they worked together to pull it closer. “The presence of food,” writes de Waal, “normally induces rivalry [in chimps], but the bonobos engaged in sexual contact, played together, and happily shared the food side by side. The chimpanzees, in contrast, were unable to overcome their competition long enough to obtain the treat.”