ich his nature made him naturally most fit" (433a). Thus in the Good City, each is assigned to his own work, and the result is the virtue of a city, justice. The Good City (healthy city) is the Just City. In the Good City, justice is the principle of order that harmonizes the parts into a unified whole. As Plato explains, "each man, practicing his own, which is one, will not become many but one; and thus, you see, the whole city will naturally grow to be one" (423d).
             Natural Classes: In the just city Plato creates three classes: the producers, the guardians (rulers) and the soldiers (auxiliaries). Each of these three classes has a certain virtue it has to display to fulfill the 'just city' pre-requisite that Plato has placed upon Kallipolis. The guardians have the natural capacity to differentiate what is best for them and what is best for the society, and also they have the most potential to be corrupt. So they must be virtuous and sophisticated by reason, wisdom and should be capable of acting for the whole city (lecture notes). The
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