“The schools built allegiance over generations in part by devoting themselves to the authority of their founders. In the case of the Stoics this meant giving an authoritative position to Zeno of Citium. For the Skeptics, the founding father was Pyrrho; Sextus Empiricus calls himself not a “Skeptic” but a “Pyrrhonist.” The Cynics looked back to Diogenes of Sinope, while in the case of the Epicureans it was, of course, Epicurus.”