I imagine part of the explanation is a desire on the part of the individual to “make it fair.” There have been experiments performed on monkeys (or apes, I can’t remember) where so long as all individuals received the same food nobody complained (even if the food wasn’t very good) but if one individual saw that another received a better type of food then it no longer accepted the ordinary food and in fact became quite angry.
Found a video of the experiment: https://www.youtube.com/watch?v=meiU6TxysCg
Latest Answers