Let me introduce you to an acquaintance of mine: Homo economicus, or economic man. He is an interesting character. Economic man (it is never economic woman) is a rational, self-interested fellow always looking out for himself. He does not give to charity. Why waste money on someone other than yourself? He never leaves a tip in a restaurant unless he expects to eat there again. He never votes because his single vote is almost certain to be worthless in determining the outcome of an election, even a close one. Give blood for a blood drive? Are you crazy? MORE