But the majority of his post-war work was focused on Jean-Jacques Rousseau, and he was asked to participate with Bernard Gagnebin on the critical edition of Rousseau's works for the Bibliothèque de la Pléiade.
Following World War II, the author dedicated his scholarly efforts to Jean-Jacques Rousseau, and he joined forces with Bernard Gagnebin to contribute to a critical edition of Rousseau's writings for the prestigious Bibliothèque de la Pléiade.