Mario Schärli

Metaphysics is, as Adorno once notes, the nuisance of philosophy. On the one hand, metaphysics is the reasons of philosophy's existence; on the other hand, it is nearly impossible to characterise metaphysics precisely. This tension is reflected with reference to the contemporary political and cultural situation in Adorno's "Meditations on Metaphysics", the last part of his opus magnum *Negative Dialectics*. The essays in this volume are devoted to different facets of Adorno's examination of metaphysics. They do, however, not only concern themselves with Adorno's metaphysical reflections in a narrow sense, but also extend to other themes Adorno relates to metaphysics: critique of concepts, history, truth, and materialism. Thereby, they render a hardly investigated topic of the *Negative Dialectics* accessible. Contributors: Emil Angehrn, Dirk Braunstein, Peggy H. Breitenstein, Gunnar Hindrichs, Axel Hutter, Philip Hogh, Christian Iber, Julia Jopp, Guido Kreis, Ansgar Martins, Brian O'Connor, Mario Schärli, Marc Nicolas Sommer, Tilo Wesche.

I maintain that substantive metaphysics makes an ineliminable contribution to our mind’s cognitive relation to objects. To account for the precise nature of this metaphysical contribution, I investigate domains of thought in which our cognitive relation to objects appears problematic. In perception, an experience’s metaphysical dependence upon objects and their essences ground its content and, in part, epistemic worth. Regarding metaphysical modality, viewing modality and actuality as equally fundamental is pivotal to understanding our modal knowledge and thought. Relating to the ontological argument, and necessary existents generally, understanding ontological statuses as differences in the way an object’s properties are grounded contributes to explaining our thoughts’ relation to objects. Systematic and historical research are integrated in developing these philosophical views, drawing on Descartes, Baumgarten, and Kant in particular.

I interpret Adorno's bold claim that all philosophy revolves around the ontological argument. On my reading, Adorno thereby expresses that all philosophy revolves around the question whether all of reality can be captured by thought. I then interpret the significance of this thesis for Adorno's *Negative Dialectics*. I argue that Adorno does not give up the ontological argument's claim—capturing reality in thought—but gives it a Marxist spin: whether reality can be captured in thought depends on its historical development, and is therefore also up to humans and their actions.