Plato (PLAY-toh; Ancient Greek: Πλάτων, Plátōn; c. 428–347 BC) was an ancient Greek philosopher of Classical Athens who is most commonly considered the foundational thinker of the Western philosophical tradition. An innovator of the literary dialogue and dialectic forms, Plato influenced all the major areas of theoretical philosophy and practical philosophy, and was the founder of the Academy, a philosophical school in Athens where Plato taught the collection of philosophical theories that would later become known as Platonism.
Plato's most famous contribution is his Theory of Forms (or Ideas), which aims to solve what is now known as the problem of universals. He was influenced by the pre-Socratic thinkers Pythagoras, Heraclitus, and Parmenides, although much of what is known about them is derived from Plato himself.
Along with his teacher Socrates, and his student Aristotle, Plato is a central figure in the history of Western philosophy. 2,400 years later, Plato's complete works are believed to have survived—unlike those of nearly all of his contemporaries. Although their popularity has fluctuated, they have consistently been read and studied through the ages. Through Platonism's outgrowth Neoplatonism, he also influenced Christian, Jewish and Islamic philosophy. In modern times, Alfred North Whitehead said: "the safest general characterization of the European philosophical tradition is that it consists of a series of footnotes to Plato."
