And this which follows is not the least evidence of my assertion, that it was owing to its migrations that Greece did not equally increase in other parts. For such as by war or sedi tion were driven out of the rest of Greece, the most powerful of them retired to Athens, as to a place of security; and becoming citizens at a very early period, made the city still greater in the number of inhabitants; so that afterwards they even sent out colonies into Ionia, as Attica itself was not able to contain them.