ABSTRACT
Moral rules as well as praxiological rales compose a triad of practical philosophy defined differently by different philosophers involved in ethics and praxiology. This chapter reviews the relationships between praxiology and ethics as described by the representatives of Polish, Austro-American, and Canadian-Argentinean approaches. Praxiology being a science of means, not of ends applies the term “happiness” in a formal sense, Therefore the praxiological proposition “man”s unique aim is to attain happiness” is tautological, because it does not imply any statement about the state of affairs from which man expects happiness, concludes Ludvig von Mises. Tadeusz Kotarbinski managed to combine his praxiology and his ethics into a conception of practical realism. The practical realism of Kotarbinski is a name of the principal attitude of a human”s programme for life he promoted as a philosopher of practicality. An exchange is a willfully induced alteration a more satisfactory state of affairs for a less satisfactory state, states Mises.
