In the Republic, Plato, through his character of Socrates, is searching for the definition of justice. During his search he creates a theoretical city of the kallipolis. This city is to be the ideal, good city. After he establishes this city in his mind he realizes that this city goes against some of the major common thought of his time, and for the city to work it must get passed these obstacles. These obstacles, or waves as Socrates calls them, are vital to the city's success. The city of the kallipolis that Socrates discusses is an ideal city and everything must work according to his plan. Socrates feels that the best way to establish a just city would be to create a city that has three classes of people. The three classes are the guardians (rulers), guardians (auxiliaries), and producers (everybody else). Socrates feels that in order for this city to work the best people, or golden people, would be on top as rulers. Then the auxiliary guardians/soldiers, or silver people, would be educated to believe that this is this best city so they will not revolt against the city. These silver people would also be censored in the things they learned, so they would act in accordance to what they learned, i.e. the rulers would not allow the soldiers to read stories of revolution. Finally, the producers, or bronze and iron people, would follow and listen to the guardians above them because of the noble falsehoods that have been told to them. They will believe that the land is mother and that they should be the producers, because that is the way this society is run, they are born into different classes and metals, and they cannot change that. The second noble falsehood Socrates explains is that the people will think that they all have equal opportunity to mate and produce offspring, when in actuality they do not. Instead the strongest males and females, or the most intelligent, moral and most beautiful are chosen to mate in an attempt to breed the best offspring.