Platonism

Ancient idealist doctrine

Platonism is the philosophy derived from Plato, centered on the belief that abstract forms or ideas are more real than physical objects.

A perfect circle exists as an ideal form; actual circles are imperfect copies.

The theory extends to concepts like justice, beauty, and goodness—eternal truths accessible through reason rather than the senses.

His Platonism led him to distrust empirical science.

In casual use, Platonic (lowercase) usually refers to nonsexual relationships, from Plato's conception of ideal love transcending physical desire.

forms

universals

Properties holding across all

ideal forms · allegory of the cave · divided line · participation · exemplars · eternal truths · immutability · immanence · instantiation

schools

Neoplatonism

Plotinus's systematic mystical metaphysics

metaphysics

ontology

Study of existence's nature

immateriality · being · becoming · emanation · nous · world soul · demiurge · receptacle · henosis · participation

epistemology

anamnesis

Recalled past, especially medical

Socratic method · contemplation · philosopher-king · education · enlightenment · reason · intellection · truth

thinkers

Socrates

Ancient Athenian questioning philosopher

texts

Republic

State without monarchy

Categories
Opposites
metaphysical ontology

Platonismmaterialism

Prioritizing goods over spirit

physicalism · naturalism · atomism · Epicureanism · nominalism

epistemological method

Platonismempiricism

Knowledge through observation

sensationalism · positivism · experimentalism · pragmatism · instrumentalism

philosophy of universals

Platonismnominalism

Universals exist as labels only

conceptualism · particularism · constructivism · conventionalism

Phrases
Family

Platonic, Platonist

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