Materialism and Ordinalism

According to Monism, there is one Substance, and according to Dualism, there are two Substances.  In contrast with each is what can be called 'Ordinalism', according to which there are two fundamental elements, ordered as superior and inferior in some respect.  A chronic confusion in the history of Philosophy is that nearly all systems, whether classified as 'Monist', or as 'Dualist', are, in fact, Ordinalist.  For, typical of Monism is the suppression of an inferior element, often via the dismissal of it as 'irreal' in some respect, e. g. Multiplicity, for Parmenides, Individuals, for Schopenhauer, etc.  Similarly, typical of Dualism is a denigration of one of its Substances, often via the thesis of a unilateral interaction between them, e. g. most Mind-Body theories, Kant's Noumenon-Phenomenon pair, etc. but perhaps more often via a normative distinction, e. g. Manichean Light vs. Dark, God vs. the Devil, etc.  Now, Marxism is no exception from this traditional confusion.  He presents his Materialism as Monist, but never quite explains how e. g. Form, Consciousness, Ideas, etc., each of which plays a role in his system, is, are only Matter.  Indeed, the dynamic factor in his system, Negation, which is distinct from the positive Matter to which it is attributed, is indistinguishable from the ex machina visitations in the systems that it presumably inverts, e. g. Spirit, Mind, etc.  So, Marxism includes a suppressed element, which, according to Marx himself, is a symptom of Ideology in what he seeks to supplant.