Are you a loyalist or a ruthless competitor?

How We Learn Fairness

A pair of brown capuchin monkeys is sitting in a cage. From time to time, their caretakers give them tokens, which they can then exchange for food. It’s a truth universally acknowledged that capuchin monkeys prefer grapes to cucumbers. So what happens when unfairness strikes—when, in exchange for identical tokens, one monkey gets a cucumber and the other a grape? When Sarah Brosnan and Frans de Waal carried out just this experiment, in 2003, focusing on female capuchin monkeys, they found that monkeys hate being disadvantaged. ….[READ]


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