The aim of this paper is to investigate how Montaigne adopts, in his own discussion of moral philosophies (and, in particular, of the proponents of natural laws), Sextus Empiricus' criticism on the same topic, as exposed in his Outlines of Pyrrhonism. I want to show that, besides the deep similarities we can find between them, Montaigne's peculiarities show themselves throughout his way of dealing with relations between reason, costume and nature, as well as in his interpretation of the opposition between a criterion of truth and a practical criterion. I maintain also that this Pyrrhonism notion occupies a prominent place in his moral reflections.
Pyrrhonism; moral; reason; nature; costume; Montaigne