Aristotelesin

Aristotelesin is the Finnish genitive form referring to Aristotle, the ancient Greek philosopher of the Classical period (384–322 BCE). He is traditionally regarded as a student of Plato and as the teacher of Alexander the Great. His writings cover a broad range of subjects and have had a lasting influence on Western thought, science, and educational traditions.

Life and works: Born in Stagira in northern Greece, Aristotelesin studied at Plato's Academy in Athens. After Plato's death he founded the Lyceum, where he conducted systematic research and taught for many years. His surviving works span logic, metaphysics, ethics, politics, rhetoric, poetics, biology, physics, and other fields. Their classification and transmission occurred mainly through the medieval and early modern periods.

Key ideas: He developed formal logic with syllogistic reasoning; introduced the theory of four causes (material, formal, efficient, final); his account of substance and form and the doctrine of hylomorphism; potentiality and actuality; teleology. In ethics, virtue as a mean and the idea of eudaimonia as the good life. In politics, the polis as a framework for achieving the good life for citizens.

Legacy: Aristotelian thought shaped medieval scholasticism and Islamic philosophy, and influenced early modern science. The corpus Aristotelicum, a collection of his works, circulated widely in translations. While parts of his natural philosophy were superseded by later science, his methodological emphasis on systematic observation and classification helped shape Western intellectual history.