 Unfortunately, Sartre insists that this group in fusion is destined to meet with what he calls an “ontological check” in the form of the institution, which cannot be escaped as some versions of anarchism and Marxism might hope. The group relapses into seriality when groups are formalised into hierarchical institutional structures. Serial otherness comes to implicate itself in interpersonal relations in at least three ways in the institution: sovereignty; authority; and bureaucracy (see Book 2, Chapter 6, “The Institution”). From the co-sovereignty of the group in fusion, someone inevitably becomes sovereign in any new social order. Similarly, a command-obedience relation comes about in institutions, to greater and lesser extents, and there will be exhortations to company loyalty, to do one’s duty, etc. (Flynn 1984: 120). Bureaucratic rules and regulation also inevitably follow, partly as a reaction to fear of sovereignty, and this installs what Sartre calls vertical otherness—top-down hierarchies, as opposed to the horizontal and immanent organisation of the group in fusion (Sartre 1960a [1976: 655–663]). As such, the revolutionary force of the group in fusion is necessarily subject to mediation by the practico-inert, as well as the problems associated with institutionality just described. Although is it still structured through a series of oppositions, the Critique delivers a sophisticated social ontology that both addresses some weaknesses in Sartre’s earlier work and unifies the social and political reflections of much of his later work.