Two Monkeys were Paid Unequally: Excerpt from Frans de Waal's TED Talk

This video has been making the rounds on social media this past week, so if you have already seen it, you can skip it--though it made me laugh every time.

 

This also explains why some companies try to keep their salary data completely secret. I am sure the monkey's reaction would have been different if she/he had no idea she/he was being cheated out of a lovely grape.