Among the many developments in philosophy in the last several years has been the relatively recent wave of books and articles, especially in ethics, linking Kantianism with Aristotelianism. Hegelians are not surprised at this turn. For Hegel, there was a kind of logic to the key concepts in Aristotle and Kant that inevitably pushed us from one to the other, and something like that thought is behind his notorious summary statement in the Phenomenology that ‘everything hangs on apprehending and expressing the true not merely as substance but also equally as subject.’ Or as we might alternately put it with a narrower scope, everything about our interpretation of Hegel hangs on what in the world we take Hegel to mean by that assertion. Answering that requires us to take a stand on what constitutes Hegel’s idealism and what constitutes his version of naturalism (even on whether there is such a thing as Hegel’s naturalism at all).

I propose a new reading of Hegel’s discussion of modality in the ‘Actuality’ chapter of the Science of Logic. On this reading, the main purpose of the chapter is a critical engagement with Spinoza’s modal metaphysics. Hegel first reconstructs a rationalist line of thought — corresponding to the cosmological argument for the existence of God — that ultimately leads to Spinozist necessitarianism. He then presents a reductio argument against necessitarianism, contending that as a consequence of necessitarianism, no adequate explanatory accounts of facts about finite reality can be given.