摘要:The prevailing economic science has neglected the study of human cooperation. This is due to the existing contradiction between rational beings who seek to maximize wellbeing, on the one hand, and the possibility of materializing objectives for the common good and implementing relational, non-coercive processes, on the other. However, experimental economics has endeavored to find an explanation for the attitude of reciprocity displayed by agents in different strategy games, given that it facilitates collective actions marked by an underlying shared intentionality that makes it possible to achieve mutually established goals. The article seeks to show when and why human beings start relating to their peers and to identify the normative basis that guides these behaviors.