Racjonalność ekonomiczna w kontekście teorii użyteczności

The paper presents fundamental, selected opinions of the rationality issue in context of economic theory of utility. Main aspects of the rational behaviour generated by precursors of utilitarianism are shown. Also a fresh approach of behavioral economics is described, with its derogations from strict rules of conduct rational homo oeconomicus. In the article criticism relating to the presentation of a model of economic phenomena can be found.