Adeimantus: But if a single state amasses the wealth of all the others, will not that be a danger to a state that has none?
Socrates: I congratulate you on your idea that any state other than the one we are constructing deserves the name.
Adeimantus: Why, what should the others be called?
Socrates: By some grander name, for each of them is not one state, but many: two at least, which are at war with another, one of the rich, the other of the poor, and each of these is divided into many more.

Plato, The Republic