Pseudo-Xenophon (Old Oligarch), Constitution of the Athenians
E. C. Marchant, Ed.

In regard to the allies: the Athenians sail out and lay information, as they are said to do; they hate the aristocrats inasmuch as they realize that the ruler is necessarily hated by the ruled and that if the rich and aristocratic men in the cities are strong, the rule of the people at Athens will last for a very short time. This is why they disfranchise the aristocrats, take away their money, expel and kill them, whereas they promote the interests of the lower class. The Athenian aristocrats protect their opposite numbers in the allied cities, since they realize that it will be to their advantage always to protect the finer people in the cities.