The field of evolutionary and neoclassical economics as a consequence of the changes in concepts of human nature.

The economics depends on the concept of human nature very strongly. The concepts of human nature can be understood as a set of assumptions made about the individual (on diff erent levels: behaviour, motives, meaning) and his interactions with other people, with groups and diverse institutions. It corresponds with the image of world people have. Th e models of human nature build foundations of economics and impact on the fi eld of the economics. Th erefore if those images of men change, the way of thinking about economics and their elements adjust to those changes as well. Th e goal of the pape r is to present the impact of these alterations of image of man on the economics. This impact will be illustrated on the example of the evolutionary economics, which is contrasted with the orthodox concept of human nature persisting in the neoclassical economics - homo economicus. The method applied to this research is, among others, a content analysis of the most important texts developed within neoclassical and evolutionary economics. To reach this goal the definition of the concept of human nature will be introduced, accompanied by the main dimensions and levels of this concept. Th en the variations of the concept of human nature at those levels and dimension will be compared between neoclassical and evolutionary economics. Diff erences in understanding of the fi eld between those two schools will be explained as resulting from the diverse concepts of human nature. Th e analysis proved that the main diff erences in those economic schools might be explained by the changed assumptions about the human nature and the image of the world. [ABSTRACT FROM AUTHOR]