https://en.wikipedia.org/wiki/Claude_Lefort
He was politically active by 1942 under the influence of his tutor, the phenomenologist Maurice Merleau-Ponty[7] (whose posthumous publications Lefort later edited).[8]
Lefort was impressed by Cornelius Castoriadis when he first met him. From 1946 he collaborated with him in the Chaulieu–Montal Tendency, so called from their pseudonyms Pierre Chaulieu (Castoriadis) and Claude Montal (Lefort).
https://en.wikipedia.org/wiki/Socialisme_ou_Barbarie#History
The double fence society
Lefort characterizes the totalitarian system by a double "fence": Totalitarianism abolishes the separation between state and society: the political power permeates society, and all preexisting human relations – class solidarity, professional or religious cooperations – tend to be replaced with a one-dimensional hierarchy between those who order and those who obey. This is made possible especially through the association between state and the party hierarchy which is always very close, so that the party hierarchy becomes the effective power. Lefort, like other theorists, thus identifies the destruction of public space and its fusion with the political power as a key element of totalitarianism.
