What is Living and What is Dead in Marx?

An editorial in The Leiter Report has addressed this weighty question (well, it is to students of history and philosophy.) After noting all the elements of Marxian thought that have been passed by in the ensuing century and a bit, he notes the remaining tenet that is still correct. Like all universals, it is so simple that it is profound: "Particularly important, in my view, remains the Marxian theory of ideology, which predicts that the ruling ideas in any well-functioning society will be ideas that promote the interests of the ruling class in that society, i.e., the class that is economically dominant." I can't argue with that.