He first conceives of a soul divided into three parts, each part guided by a distinct desire (436a-439e). The appetitive segment is ruled by the desire to satisfy basic needs and wants, the spirited segment is ruled by the desire for honour and the rational segment is ruled by our desire for truth and knowledge. Plato’s idea of a just soul is one in which each part plays its appropriate role in the functioning of the individual, specifically, the soul led by its rational compartment which is aided by the spirited part in keeping the appetitive segment in check (441e). These divisions have corresponding divisions in the Kallipolis; the productive class mirrors and fulfills the desires of the appetitive part of the soul, the auxiliary class – the spirited part, and the ruling class corresponds to the rational part of the soul (441d). Just associations amongst the societal classes are also mirrored in the soul; the just city is governed by its rational ruling class as the just soul is governed by its rational third (441e). Plato’s conception of the tripartite soul makes some assumptions; it assumes that mental agents of desire then force the body to act, that all human desire can be segmented into three categories, and that the structure of the soul is integral to our understanding of justice. The second claim is problematic as Plato proves that there are at least three categories …show more content…
It is inextricably tied up with ideas of justice as a sort of specialisation; it is just to do what one is most aptly suited for to the best of one’s ability and not to interfere with the tasks of others. This is said to be good because it allows for the healthy functioning of the unit. Nevertheless, there are a wide range of criticisms to be applied to his analogy and these criticisms vary in validity. Plato’s Kallipolis still retains some unjust elements as it allows for social mobility in theory but never explains the mechanism for social mobility in practice. It also does not account for the dynamic nature of human development in which a person may not retain the same characteristics throughout the entirety of their life. The ideal city also relies too heavily on propaganda for its stability to be described as truly just. Plato’s tripartite soul theory also rests on a few assumptions which he never substantially defends. He proposes that the soul is divided into three parts but never accounts for why there can only be three parts and not more. He also asserts but never explains how just actions follow from a just individual. Plato’s analogy is therefore many things but it is not fallacious as some have argued as he does eventually achieve that which he set out to do. He proves justice is good by its own merits because it allows for peak