It seems plausible to me that they could equally have been called pre-Plato. Whats the significance of Socrates? Did he instill an ethical turn in Hellenic philosophy (or be seen to do so)?
Heraclitus proposed that everything was in flux always: The Greeks before Heraclitus focused on the essence of things, its nature and being, which they deemed unchangeable. In contrast, Heraclitus ...