Right
Arguing that reality is one unchanging whole
Founding Epicureanism, the pursuit of tranquil pleasure
Founding the Lyceum and tutoring Alexander the Great
Founding Stoicism
The Socratic method of questioning
The doctrine of constant change — “you cannot step in the same river twice”
The Sophist maxim “man is the measure of all things”
The first philosopher; predicted a solar eclipse
The atomic theory of matter
The theorem relating the sides of a right triangle
Founding the Academy and writing The Republic
Living as a Cynic in a large ceramic jar