Socrates states in book III, “…the first and most important of god’s commandments to the Rulers is that in the exercise of their function as Guardians their principal care must be to watch the mixture of metals in the characters of their children. If one of their own children has traces of bronze or iron in its make-up, they must harden their hearts, assign it its proper value, and degrade it to the ranks of the industrial and agricultural class where it properly belongs…” (415b, c). The concept of class order proposed here requires great checks and balances to ensure that the state remain in harmony and stability, with wisdom in charge rather than desire. It is for this purpose that Socrates argues later on This tripartite division, much like the tripartite division of soul, designates a clear rank and structure, and a fixed relationship among the classes which is in harmony to produce the ideal city-state. With the gold class representing reason and wisdom, they are to be upheld by the honor of the silver class, and sustained through the produce of the bronze class. This specialization is proposed to allow the best natural qualities of individuals to benefit each other to their greatest ability. According to Socrates, “the state founded on natural principals is wise as a whole in virtue of the knowledge inherent in its smallest constituent part or class, which exercises authority over the rest” (428e). Governed by reason and knowledge of what is good, rather than opinion of what is good, Socrates argues his position for the philosopher being the best fit to rule over the other classes.
Plato proposes guidelines to prevent power from corrupting the Guardians and Auxiliaries of state. Among these guidelines, it is suggested that Guardians “have no private property beyond the barest essentials” (416d). This is done to keep desires from corrupting the gold and silvers, who are solely purposed as servants to the state as a whole. Socrates argues further for the necessity of these checks and balances, “If they acquire private property in land, houses, or money, they will become farmers and men of business instead of Guardians, and harsh tyrants instead of partners in their dealings with their fellow citizens” (417b). Socrates describes conditions in which the position of power has led to the corruption of the soul and in