In the Republic, a large portion of the book is used to describe Socrates' Kalipolis or ideal city-state. Socrates' Kalipolis is composed of:
1. Producers - Which include farmers and craftsmen
2. Guardians - Protectors of the Kalipolis
3. Rulers - aka Philosopher-Kings
These 3 classifications were also referenced as the metals bronze, Silver, and Gold.
Another interesting piece of the Republic was Socrates' rankings (and the justification of those rankings) of four forms of character types and the city states that result when those character types rule. The types rank as follows: (with the Kalipolis, obviously above all)
1. Kalipolis
2. Timocracy- Ruled by those who are ruled souly by their spirit where the desire for honor, good reputation, and victory reside.
3. Oligarchy - Ruled by those who are ruled by their necessary appetites.
4. Democracy - Ruled by those who are ruled by their unnecessary appetites.
5. Tyranny - Ruled by those who are ruled by fear and their lawless unnecessary appetites.