Assertion: altruism | /r/HasProperty | a form of behaviour
Facets:
Source sentences:
text: Altruism is a form of behaviour that benefits other individuals at the expense of the one that performs the action; the fitness of the altruist is diminished by its behaviour, whereas individuals that act selfishly benefit from it at no cost to themselves.
text: Altruism and fairness can be considered as forms of behaviour that make the social environment more conducive to living and breeding for an entire population, and emotion-based mechanisms that punish egoism with exaggerated retaliation might be expected to evolve in tandem with egoism, thereby limiting its effects [Trivers, 1971; Frank, 1989].