He & Sartre had been friends until his attack on Stalinist communism l'estranged them
[DOC] [TLE] chapter4 - UCI [PAR] To Lefebvre, Sartre's existentialism had nothing to do with Marxism, but was part 
of ... A few years later Sartre recalled his relations with the CP in the mid-1940s 
with ... and attack in fact may have followed Sartre's refusals to become one of 
them.