History of the Peloponnesian War

And it is none of the least evidences of what I have said that Greece, by reason of sundry transplantations, hath not in other parts received the like augmentation. For such as by war or sedition were driven out of other places, the most potent of them, as to a place of stability, retired themselves to Athens; where receiving the freedom of the city, they long since so increased the same in number of people, as, Attica being incapable of them itself, they sent out colonies into Ionia.

And to me the imbecility of ancient times is not a little demonstrated also by this [that followeth]. For before the Trojan war nothing appeareth to have been done by Greece in common;

nor indeed was it, as I think, called all by that one name of Hellas; nor before the time of Hellen, the son of Deucalion, was there any such name at all. But Pelasgicum (which was the farthest extended) and the other parts, by regions, received their names from their own inhabitants. But Hellen and his sons being strong in Phthiotis and called in for their aid into other cities, these cities, because of their conversing with them, began more particularly to be called Hellenes; and yet could not that name of a long time after prevail upon them all. This is conjectured principally out of Homer.