The Greeks of antiquity were remarkable not only for being the first great thinkers, but also for the depth of their thinking. In the cruel world of antiquity where living itself was a struggle, they contemplated the unity of man and his relationship with others of his species. This manner of deep thinking is vividly demonstrated in Platos’ dialogs, specifically in The Protagoras.
Plato, in the Protagoras, uses the famous sophist of that name to explain how man was given the skills he needed to survive in the world. One of them, virtue, must be taught because it does not come easily to human beings.