`On the Marxist Imaginary...' is an excerpt from a larger work that uses the history of Socialisme ou Barbarie (1949-67) to examine the role of the problem of praxis in Cornelius Castoriadis's more political writings. The present article examines the schema his revolutionary group Socialisme ou Barbarie developed between 1952 and 1956 to link working-class experience, autonomous strikes, and possibilities for revolution and socialism.