Friedrich Nietzsche (1844–1900), a critic of Western culture and Christianity in particular, was the author of "Zur Genealogie der Moral" (1887), a polemical study on the various manifestations of the constitution of morality. According to the German philosopher, ressentiment appears to be important in the genealogical study of morality. This specialised term, for which Nietzsche finds no equivalent in his native language, is the key to understanding the new construction of morality from the perspective of the revaluation of values (Umwertung aller Werte). This article is a selective attempt to describe ressentiment as a reactive feeling and a fact of human moral life by showing the semantic scope of the concept and presenting the functioni...