When was The Republic written by Plato?
Republic (Plato)
For over two and a half millennia, scholars have differed on the aptness of the city-soul analogy Socrates uses to find justice in Books II through V.[17] The Republic is a dramatic dialogue, not a treatise. Socrates' definition of justice is never unconditionally stated, only versions of justice within each city are "found" and evaluated in Books II through Book V. Socrates  constantly refers the definition of justice back to the conditions of the city for which it is created. He builds a series of myths, or noble lies, to make the cities appear just, and these conditions moderate life within the communities. The "earth born" myth makes all men believe that they are born from the earth and have predestined natures within their veins. Accordingly, Socrates defines justice as "working at that which he is naturally best suited", and "to do one's own business and not to be a busybody" (433a–433b) and goes on to say that justice sustains and perfects the other three cardinal virtues: Temperance, Wisdom, and Courage, and that justice is the cause and condition of their existence. Socrates does not include justice as a virtue within the city, suggesting that justice does not exist within the human soul either, rather it is the result of a "well ordered" soul. A result of this conception of justice separates people into three types; that of the soldier, that of the producer, and that of a ruler. If a ruler can create just laws, and if the warriors can carry out the orders of the rulers, and if the producers can obey this authority, then a society will be just.