In his book ‘The Republic’, Plato searches for justice within the individual and what makes a person ‘just’. By comparing his sense of what is just at a political level and what is just at a psychological level he suggests three virtues of the individual which will make that particular person just. The virtues of wisdom, courage and moderation are common to both a just and the fictional just city of Kallipolis. This artificial city has the pre-determined virtue of being just – he does this in order to understand what justice is for the individual because Plato thinks that ‘a just man won’t differ at all from a just city in respect to the form of justice; rather he’ll be like the city.’ (Republic 435b)
In the just city Plato creates three classes: the producers, the guardians and the rulers. 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 rulers are required to exhibit wisdom so that ‘a whole city established according to nature would be wise because of the smallest class and part in it, namely the governing or ruling one. And to this class, belongs a share of the knowledge that alone among all the other kinds of knowledge is to be called wisdom.’ (428e-429a) The wisdom enjoyed by the rulers would be used to ensure that the city has ‘good judgement and [be] really wise.’ (428d)
The guardians (soldiers) of Kallipolis would be educated in order to absorb the laws in the finest possible way (430a) – ‘so that their belief about what they should fear and all the rest would become so fast that even such extremely effective detergents such as pleasure, pain, fear and desire wouldn’t wash it out.’ Their ability to remain focused is the virtue of courage – which Pl ...