Plato was a philosopher from Ancient Greece who founded the Academy of Athens and used it as a platform to convey his ideas about ethics, politics, and philosophy. Plato focused on Philosophical topics such as Epistemology and Metaphysics. He explored political science and looked for the best form of government, and he expanded what we know regarding the dichotomy of knowledge and opinion as well the idea of "nature vs. nurture".
The Seventh Letter
All men are by nature equal, made all of the same earth by one Workman; and however we deceive ourselves, as dear unto God is the poor peasant as the mighty prince.