This book is a development of Jean-Paul Sartre’s philosophy. And the goal is to make Sartre’s work relevant for issues in contemporary philosophy in a new way. The relevance of the French philosopher for the study of human beings lies in two essential dichotomies that pervade his thought. That is, the dichotomy of freedom/facticity and that of individual/group. If the subject appears isolated in his consciousness in Being and Nothingness (L’être et le néant, 1943), in his next great work, the Critique of Dialectical Reason (Critique de la raison dialectique, 1960), the subject now appears subsumed under society in what Sartre calls serial groups or groups in seriality or sérialité: ‘[the collective] structures the subjects’ relationships of practical entities according to the new rule of the series’.2 The meeting point between the individual and the group does not seem to be found in the French philosopher’s work until his last writings, where the concept of the universal singular appears for referring to the subject, especially in The Family Idiot:Gustave Flaubert, 1821–1857 (L’Idiot de la Famille, 1981).