The class divide has been present since the agricultural revolution and its initial production of a material surplus.
So, to be precise, I'd say that the relations of production (like that of capitalism with its private expropriation of surplus labor value), manifest in *class*, rather than in *class struggle* (which is concomitant anyway).
Your meaning with your use of the term 'denomination' isn't clear. (Perhaps you mean that a new kind of ruling class comes to power whenever a new paradigm of relations of production emerges, like the bourgeoisie accompanying market relations, over the aristocracy that accompanied feudal relations.) (And, if this is what you mean, you're being *fatalistic*, implying that the next mode of production, or relations-of-production, will also be class-divided, and *won't* be class-transcending world socialism.)


