The problem of inflation bold a crucial position in Friedman'a works. According to him, intensifying inflationary trends constitute a major threat for the future of capitalism both as regards effectiveness of its economics functioning and prospects of undisturbed social development. Friedman's theory of inflation is represented, in fact, by the hypothesis about a natural unemployment rate, which combined with the neo-quantitetive theory of nominal income is to explain the mechanism and causes of a general growth of prices. In the final account, Friedman believes that the cause of inflation is an erroneous state policy permitting for appearance of an excessive quantity of money in circulation. Consequently the observance of the so-called monetary rule principle i.e. maintenance of a steady growth rate of money supply in circulation is considered by him to be the most appropriate policy of price stabilization. Zadanie pt. „Digitalizacja i udostępnienie w Cyfrowym Repozytorium Uniwersytetu Łódzkiego kolekcji czasopism naukowych wydawanych przez Uniwersytet Łódzki” nr 885/P-DUN/2014 dofinansowane zostało ze środków MNiSW w ramach działalności upowszechniającej naukę.