A school of thought believed altruism could be explained in an evolutionary sense. The idea that homosapiens figured out long ago that by helping others in the tribe or community was beneficialto the individual as well and this has been passed down throughout the years. Also, there is the way of thinking that denotes altruism as a form of selfishness implying true altruism asit is defined is non-existent. i.e. If you help others because it makes you feel good to do so, then the good feeling is the selfish reward.