Stoicism is a school of philosophy, the founding of which is associated with Zeno of Citium, which became the foremost popular philosophy among the educated elite in the Greco-Roman Empire, H.D. Amos and A.G.P. Lang, “These Were the Greeks†to the point where, in the words of Gilbert Murray, "nearly all the successors of Alexander [...] professed themselves Stoics."Gilbert Murray, The Stoic Philosophy (1915), p.25.