Man, says Protagoras, now has the wisdom necessary for life ... but he does not have political wisdom. At this point, people are living spread out and hence are at the mercy of stronger animals, who begin killing them off.... They seek to save themselves from the beasts by banding together and forming cities. But they do injustice to one another, at such close quarters, because they lack the political art. So, dispersed once more, they begin perishing again.