Sustancialismo

Sustancialismo is a position in ontology and metaphysics that emphasizes the primacy of substances as the fundamental bearers of properties and causal power. Proponents argue that most of what exists can be understood best if viewed as constituted by substances—entities that persist through change while bearing essential attributes that define their identity. In this view, properties, relations, and states of affairs depend on or inhere in substances, rather than existing independently as a network of relations.

Historically, sustancialismo traces to Aristotle's theory of substance and to scholastic debates on essences and universals. In modern times the term has been used in Spanish-speaking circles to describe a family of positions that rest on a substantive ontology, often linked to essentialist or hylomorphic approaches, and contrasted with nominalist or relational theories.

Core tenets include: ontological priority of substances over their predicates, the existence of essential and intrinsic properties that ground persistence over time, and the idea that identity conditions for objects are grounded in their substratum or form. Debates often address persistence through change (how a substance remains the same while its properties vary) and the scope of substances (do substances exist for complex systems, organisms, or social entities).

Critics challenge the coherence or scientific applicability of a substance-based account, pointing to successful formulations in physics and biology that emphasize relations, fields, or processes over discrete substrata. In contemporary ontology, sustancialismo remains a counterpoint to relational or eliminative theories and informs discussions about the nature of objects, substances, and their essences.

See also: substance theory, essentialism, Aristotelianism, ontology.