Ontology is the branch of philosophy that asks: what kinds of things are real? When you look at a table and ask whether the table is a real thing or just a collection of atoms arranged in a table-shape, you’re doing ontology. When you ask whether numbers exist, whether justice is a thing in the world or just a word people use, whether a relationship between two people is as real as the people themselves — those are ontological questions.
The word comes from the Greek ontos (being) and logos (study). Ontology doesn’t ask whether any particular thing exists (that’s a question for science, or for looking around). It asks what existence itself involves. What does it take for something to count as real? What categories of things are there?
The dominant tradition in Western philosophy — substance ontology — answers that the world is made of independent things (substances) that have properties and enter into relations with each other. A rock exists on its own; its hardness is a property it has; its sitting on a table is a relation it enters into. The rock comes first; relations come second.
Relational ontology reverses this priority. Relations don’t happen between pre-existing things; things are constituted through relations. The rock is what it is because of the relations it sustains — its molecular bonds, its position in a landscape, its history of formation. Change the relations, and you change the thing. This is the ontological position at the foundation of the relationality project developed in this vault: relations are more fundamental than the entities they relate.
The distinction between substance ontology and relational ontology isn’t abstract. It shapes how people think about identity, ecology, politics, and knowledge. If people are independent substances, then society is a contract between pre-formed individuals. If people are constituted through relations, then severing someone from their relations — from land, language, community — doesn’t just inconvenience them; it changes what they are.
Related terms
- Relational Ontology — the position that relations are prior to entities
- Metaphysics — the broader study of the fundamental nature of reality, of which ontology is a part
- Epistemology — the study of knowledge; what you think exists shapes what you think counts as knowing
- Ontological turn — the movement in philosophy and anthropology that takes non-Western ontologies seriously
- Ontologization — treating contingent arrangements as fixed features of reality
- Mereology — the study of parts and wholes, a subfield of ontology