Bonobos in particular should warrant our most immediate concern. They are closer genetically to humans than any other species—even closer than chimps. Anatomically, they resemble Australopithecus—our earliest hominid ancestor. They are capable of walking upright for far greater distances than chimpanzees, and they resemble humans more than chimps do. Their societies are female dominated, and they prefer to resolve personal conflicts through sexual behaviors rather than violence, unlike chimpanzees.