The aim of this paper is to introduce the peculiarity of habit theory in French early modern philosophy, starting from an analysis of the different approaches to this topic. The author shows that next to the Calvinist and Bodinist point of views, which respectively identify habit with sin and virtue, there is a third position, that of La Boétie, Montaigne, Charron and Camus, which focus on the mechanism of habituation and discourse on evil, investigating how habit can lead to the corruption of human nature.

Keywords: Habit; Free will; Servitude; Vice; Sin.