(groupe en fusion) French philosopher Sartre, Jean-Paul’s term for a group of people united by a common purpose. A crucial component of Critique de la Raison Dialectique (1960), translated as Critique of Dialectical Reason (1976), Sartre’s theory is that the majority of people are displacement from one another for the majority of time, a state he refers to as seriality. What they lack, he argues, is praxis, namely the will to get involved in the political process. The group-in-fusion is not an ‘innocent’ or ‘ideal’ form in that it can refer to both progressive and fascistic types of social movement.