Frans de Waal shows us a task he gave Capuchin monkeys to see if they responded to a sense of fairness. For the full video see http://www.youtube.com/watch?v=GcJxRqTs5nk

Frans de Waal is a Dutch primatologist and ethologist. He is the Charles Howard Candler professor of Primate Behavior in the Emory University psychology department in Atlanta, Georgia, and director of the Living Links Center at the Yerkes National Primate Research Center and author of numerous books including Chimpanzee Politics and Our Inner Ape. His research centers on primate social behavior, including conflict resolution, cooperation, inequity aversion, and food-sharing. He is a Member of the United States National Academy of Sciences and the Royal Netherlands Academy of Sciences.