There may be only two groups of humans who truly understand how chimpanzees look at the world. The first is those who have studied chimpanzees in the wild, trailing along behind them day after day, watching as males manipulate both friends and enemies in their struggle to ascend to alpha status; or looking on in sympathy as a heavily pregnant female, tired after a long day of gathering, calculates which feeding site might pay-off best for the day’s last meal. After perhaps a year of such snooping, an observer might begin to understand what it is like to inhabit the mind of the chimpanzee, to think about the world and other chimpanzees as a chimpanzee does.