Not just humans. See this clip for a hilarious study into fairness done on monkeys: http://www.youtube.com/watch?feature=player_detailpage&v=b_Lm49XVkGQ#t=751s

Not just humans. See this clip for a hilarious study into fairness done on monkeys: http://www.youtube.com/watch?feature=player_detailpage&v=b_Lm49XVkGQ#t=751s http://www.youtube.com/watch?feature=player_detailpage&v...