Do Monkeys Understand Unequal Pay? (Video)

"We don't expect animals to understand human "inventions" like economics. Pay scale, income inequality, surely these are concepts too advanced for lower species to process. Or are they? The above video, part of a TED talk given by Emory University's Dr. Frans de Waal, showcases the emotional reaction of one Capuchin monkey when confronted with unequal pay for equal work. The work, in this case ...