/lit/ - Literature

Because like most ideologies doomed to fail it is idealist. It doesn't start from the viewpoint on how things are, such as with Marx's far more cogent economic criticism, but how things ought to be in their view.
That sort of thinking is very apparent in the modern succesor left's insistence on "educating" normal people on the right way to think rather than accomodating their politics to their already held views.