The whole of Western metaphysics, particularly Platonism, sets up a partition between the sensory world and the supersensory world, laying the foundation for the mythology of the supersensory world. After Descartes set contemporary metaphysics on its course, Feuerbach became the first to attack the essence of the supersensory world on an ontological level and to transfer the criticism of theology to that of metaphysics in general. While in the final analysis Feuerbach’s criticism fails, Marx’s revolution appeals to the ontological notion of “sensory activity” or “objective activity” (i.e., practice), the core of which rests in piercing and overturning the fundamental framework of contemporary metaphysics—“the immanence of consciousness.” It is this ontological revolution which reveals the camouflage of the supersensory world’s mythology (i.e., ideology) and which simultaneously establishes a solid foundation for the critical analysis of the latter. Marx’s “science of history” is based on this foundation and develops from it.