A Brief Introduction to Ontology

Ontology is the branch of philosophy concerned with being, existence, and reality. From the Greek ontos ("being") and logos ("study"), it asks the most basic question of all: What is there? and What does it mean for something to exist?

Core Questions

• What kinds of things exist?
• What is the nature of existence itself?
• Are there fundamental categories of being (objects, properties, relations, events, processes)?
• What is the difference between what appears to exist and what really exists?
• Do abstract entities (numbers, concepts, meanings) exist, and if so, in what sense?

Major Positions

• Realism – There is a mind-independent reality that exists regardless of whether anyone perceives or thinks about it.
• Idealism – Reality is fundamentally mental or mind-dependent; what we call "the world" is inseparable from consciousness or thought.
• Materialism / Physicalism – Everything that exists is ultimately physical matter or energy.
• Dualism – Reality comprises two fundamentally different kinds of substance (e.g., mind and body).
• Nominalism vs. Realism about universals – Do general categories (like "redness" or "humanity") exist independently, or are they just names we apply to particular things?
• Process ontology – Reality is fundamentally made of processes and change rather than static substances (associated with Alfred North Whitehead and, in anthropology, Tim Ingold).

Ontology vs. Epistemology

These two are often paired but are distinct:

A, perhaps, useful shorthand: ontology is about the world; epistemology is about our access to it.

Ontology in Anthropology

Ontology has become increasingly important in anthropology, especially through the "ontological turn" associated with scholars like Eduardo Viveiros de Castro, Philippe Descola, and Tim Ingold.

Key ideas:

• Multiple ontologies – Different cultures may not simply interpret the same world differently; they may inhabit genuinely different worlds with different kinds of beings, relations, and realities.
• Challenge to nature/culture divide – Many societies do not separate "nature" from "culture" the way Western thought typically does. For example, Amazonian perspectivism holds that humans and animals share a common spiritual essence but see different bodily forms.
• Beyond representation – Rather than asking how accurately a culture represents reality, anthropology asks what realities are enacted through practices, rituals, and relationships.
• Methodological implications – The anthropologist cannot assume a single universal reality against which other worldviews are measured; instead, different ontologies must be taken seriously on their own terms.

In Short

Ontology is the study of what exists and what it means to exist. Once confined to metaphysics, it now plays a significant role in anthropology by forcing the discipline to question whether "reality" itself is singular and universal—or plural and culturally enacted. Where epistemology asks how we know, ontology asks what there is to know—and whether different peoples might live in genuinely different worlds.

OntologyEpistemologyConcernsWhat existsWhat and how we can knowQuestion"What is there?""How do we know it?"FocusReality and beingKnowledge and justification