Ontology: Being, Existence, and the Structure of Reality
Ontology is the branch of metaphysics concerned with being, existence, and the most general structure of reality. It asks what there is, what kinds of things exist, how those things are organized into categories, whether some entities are more fundamental than others, and how relations of dependence, composition, identity, and modality shape any serious account of the real. From Aristotle’s investigations into substance and category to contemporary debates over grounding, mereology, abstract objects, possible worlds, and social ontology, the history of ontology is the history of philosophy’s attempt to clarify what reality contains and how reality is structured. This content pillar explores ontology historically, systematically, and critically, providing a foundation for future work on being, essence, universals, particulars, truthmakers, fundamentality, and the layered architecture of the world.









