Abstract
This article elaborates an alternate general approach to rationality, starting with the Hayekian concept of mind as a complex system of genetically, culturally, and individually created and transmitted rules. “Evolutionary rationality” is an individualistic alternative to “Homo economicus” and the conventional concept of utility maximization under constraints. Its main elements are examined by means of an analysis of paradoxes in the theory of games, as well as anomalies in the conventional approach that have been uncovered by experimental economics. This yields an approach to rationality in which individuals are “power-maximizers,” able to synthesize both rational and rational behaviors in their standard meanings. “Evolutionary rationality” is thus a unity of reason and emotion—a unity that can be restated in evolutionary terms as recognizing the negative adaptive consequences of “Homo economicus” in our species' social context. Such unity of reason and emotion also prevails in cultural evolution. “Social affectivity” is linked to particular patterns of competition for power and the production of public goods within specific societies. Different consequences for the general analysis of social order are sketched, with special attention to the role of groups in the making of society.
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