in the 1960s, chimpanzees did not yet occupy the special place in science on human evolution reserved for them today. baboons were considered the best model of human evolution, since baboons had descended from the trees to become savanna-dwellers, like our ancestors. these rambunctious monkeys, however, are genetically more distant from us, and many of the characteristics deemed important for human evolution, are either absent or minimally developed, such as tool technology, cooperative hunting, food sharing, territoriality, cultural traditions, and certain cognitive capacities, such as planning and theory-of-mind. chimpanzees show all of them.