Theophrastus (c. 371 – c. 287 BC) was an ancient Greek philosopher and naturalist who succeeded Aristotle as the head of the Lyceum, the Peripatetic school of philosophy in Athens. Born Tyrtamos in Eresos on the island of Lesbos, he earned the nickname "Theophrastus" (meaning "divine speaker") from Aristotle in recognition of his remarkable eloquence. He initially studied at Plato's Academy before aligning himself closely with Aristotle, whose philosophical system he would spend his life supporting, expanding, and refining.\n\nWhen Aristotle fled Athens, Theophrastus took over the leadership of the Lyceum, presiding over the school for thirty-six highly successful years. His intellectual pursuits were exceptionally broad, encompassing biology, physics, ethics, grammar, logic, and metaphysics. In his philosophical work, he made notable departures from or developments of Aristotelian thought, such as viewing space as the arrangement of bodies, time as a byproduct of motion, and happiness as dependent on external circumstances in addition to virtue.\n\nToday, Theophrastus is most famous as the "father of botany." His two landmark botanical treatises, Enquiry into Plants and On the Causes of Plants, established the foundational methodology for the study of plant life and remained highly influential well into the Renaissance. Beyond botany, his surviving writings include On Moral Characters, On Sense Perception, and On Stones, alongside various fragments on physics and metaphysics. Following his death, he was honored by the citizens of Athens with a public funeral.
