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Thinker · 384–322 BCE

Aristotle

Ἀριστοτέλης

Aristotle built interconnected methods for logic, natural inquiry, metaphysics, ethics, politics, rhetoric, and poetics around explanation of changing substances.

Intellectual setting

Aristotle spent about two decades in Plato's Academy before pursuing wide empirical and systematic inquiries and founding the Lyceum in Athens.

Key ideas

Four causes

Adequate explanation may ask what something is made from, its form, its source of change, and its end.

Practical wisdom

Ethical judgment is a cultivated ability to deliberate well about action in circumstances that resist mechanical rules.

Legacy

His works became organizing authorities for philosophy and science in Greek, Arabic, Latin, and other learned traditions, while also provoking repeated critique.