In evolutionary theory, biological altruism is the observed occurrence of an organism acting to the benefit of others at the cost of its own reproductive fitness. While biological egoism does grant that an organism may act to the benefit of others, it describes only such when in accordance with reproductive self-interest. Kin altruism and selfish gene theory are examples of this division. On biological altruism, the Stanford Encyclopedia of Philosophy states: "Contrary to what is often thought, an evolutionary approach to human behaviour does not imply that humans are likely to be motivated by self-interest alone. One strategy by which ‘selfish genes’ may increase their future representation is by causing humans to be non-selfish, in the psychological sense." This is a central topic within contemporary discourse of psychological egoism.
In evolutionary theory, biological altruism is the observed occurrence of an organism acting to the benefit of others at the cost of its own reproductive fitness. While biological egoism does grant that an organism may act to the benefit of others, it describes only such when in accordance with reproductive self-interest. Kin altruism and selfish gene theory are examples of this division. On biological altruism, the Stanford Encyclopedia of Philosophy states: "Contrary to what is often thought, an evolutionary approach to human behaviour does not imply that humans are likely to be motivated by self-interest alone. One strategy by which ‘selfish genes’ may increase their future representation is by causing humans to be non-selfish, in th!e psychological sense." This is a central topic within contemporary discourse of psychological egoism.