During the events of May 1968, Althusser was hospitalized because of a depressive breakdown and was absent in the Latin Quarter. Many of his students participated in the events, and Régis Debray in particular became an international celebrity revolutionary. Althusser's initial silence was met with criticism by the protesters, who wrote on walls: "Of what use is Althusser?" ("A quoi sert Althusser?"). Later, Althusser was ambivalent about it; on the one hand, he was not supportive of the movement and he criticized the movement as an "ideological revolt of the mass", adopting the PCF official argument that an "infantile disorder" of anarchistic utopianism that had infiltrated the student movement. On the other hand, he called it "the most significant event in Western history since the Resistance and the victory over Nazism" and wanted to reconcile the students and the PCF. Nevertheless, the Maoist journal "La Cause du peuple" called him a revisionist, and he was condemned by former students, mainly by Jacques Rancière. After it, Althusser went through a phase of "self-criticism" that resulted in the book "Essays in Self-criticism" ("Éléments d'autocritique", 1974) in which he revisited some of his old positions, including his support of the Soviet invasion of Czechoslovakia.