al·tru·ism [áltroo ìzzəm]
selflessness: an attitude or way of behaving marked by unselfish concern for the welfare of others
belief in acting for others’ good: the belief that acting for the benefit of others is right and good
Extrapolating from the first definition, altruism is being a benefactor to others without the expectation of reward of any kind.
Assertion: There is no altruism in human society.
Human generosity exists because people believe they will be rewarded in some imagined life after death, or because of the good feeling of helping others. There are no exceptions unless you consider the atheist who throws himself in front of a bullet meant for someone else.
Conclusion: There is no altruism in human society.
(Human behavior observation 081111)