# Reciprocal altruism [[2025-0310. 'Reciprocal Altruism or reciprocity occurs when an individual performs a costly act for the benefit of another individual in anticipation of receiving beneficence via a costly act in return.'|'Reciprocal Altruism or reciprocity occurs when an individual performs a costly act for the benefit of another individual in anticipation of receiving beneficence via a costly act in return.']][^1] [^1]: Richard C. Connor, ‘[[Connor. ‘Egg-trading in simultaneous hermaphrodites’, 1992.|Egg-trading in simultaneous hermaphrodites: an alternative to Tit-for-Tat]]’, *Journal of Evolutionary Biology* 5 (1992), p. 523.