If you ever want to pay monkeys to do a job for you, as you do, daily occurrence and all that, then you’d better make sure all of the monkeys get paid equally.
If not, there’ll be trouble. Maybe you’ll have poo thrown at you or something.
This video shows an actual experiment that took place, with two monkeys paid unequally. The reaction of the one who received cucumber instead of grapes is a sight to behold.
This behaviour is absolutely stunning. Not only is it a very human reaction to minor inequality, being very close to a tantrum by a toddler, but it also suggests a real and emotional intelligence.