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.