Quote: Money is a powerful force in human life and affairs. Its very power gives pause to those who look to evolution for full explanations of human behavior, because money has not existed long enough to have influenced evolution. By some estimates, money only goes back a couple thousand years, which is too short even to have influenced human evolution. Still, one can get some clues as to how evolution prepared us for money from the burgeoning research that seeks to present animals with economic choices. To gain perspective on human financial decisions, one may ask, what would monkeys do? Monkeys don’t care about money, per se, but they do care about marshmallows.