The best exponent of anarchist philosophy in ancient Greece was Zeno (342–267 or 270 B.C.), from Kition, the founder of the Stoic philosophy, who distinctly opposed his conception of a free community without government to the state-Utopia of Plato. He repudiated the omnipotence of the State, its intervention and regimentation, and proclaimed the sovereignty of the moral law of the individual — remarking already that, while the necessary instinct of self-preservation leads man to egotism, nature has supplied a corrective to it by providing man with another instinct — that of sociability. When men are reasonable enough to follow their natural instincts, they will unite across the frontiers and constitute the Cosmos. They will have no need of law-courts or police, will have no temples and no public worship, and use no money — free gifts taking the place of the exchanges.