Must we still cite Marx as an authority in order to say ‘I am not a Marxist’? What is the distinguishing trait of a Marxist statement? And who can still say ‘I am a Marxist’?

Jacques Derrida, Spectres of Marx

Had Marxism not existed, ‘post-Marxism’ would have had to invent it, so that ‘deconstructing’ it once more would give the ‘deconstructionists’ something further to do. All this gives Marxism a curious life-after-death quality. It is constantly being ‘transcended’ and ‘preserved’.