New research by Leakey Foundation Scientific Executive Committee Member Joan Silk suggests that humans willingly incur costs to punish selfishness in others, and our societies are likely more cooperative as a result.
Human beings used to be defined as “the tool-maker” species. But the uniqueness of this description was challenged in the 1960s when Dr. Jane Goodall discovered that chimpanzees will pick and modify grass stems to use to collect termites. Her observations called into question homo sapiens‘ very place in the world. Since then scientists’ knowledge of animal tool use has expanded exponentially.