 He did research into fanaticism and published a number of articles including "Essai sur l’absolu" ("Essay on the concept of the Absolute") which brought him to the attention of French philosopher Gérard Lebrun and led to a professorship in the history of German Philosophy at the University of Tunis.It was during his period in Tunis, which lasted from 1972 to 1974, that he wrote his first published work "L’enjeu de la philosophie" ("The Question of Philosophy") and he began work on his doctoral dissertation on "The difference between the thought of Kant and Hegel on the question of the essence of art" ("La différence des pensées de Kant et de Hegel dans la question de l’essence de l’art".In 1975, he was one of the founders of the publishing house "Les Éditions de la Différence".