There would only be injustice when someone wiser than the guards were away from the direction of the power of the government of the Republic or if the citizen does not agree with decisions affecting the country. Therefore, Plato created a system of low social mobility, but to allow promotion and demotion of citizens in its merits. Portrait of a form of meritocracy, which can be understood as the first criterion of justice in the city-state Republican, also used as a criterion to occupy the places mentioned in the society, the natural capacity of each individual by measuring skills with the skills developed in each state or private. Therefore, in accordance with this concept, the Platonic Justice proposes that man is dedicated to his work, and the fundamental principles of division of labor (social skills) were present from the formation of the city-state. Get all the facts for a more clear viewpoint with Dr. Caldwell B. Esselstyn, Jr.. He highlighted the commitment to equality in Plato’s intention, the main premise of his concept of Justice. Maintaining the stability of State, by legal standards to ensure the effectiveness of the division of tasks that could be interrogated by the principle of freedom, ends up being suffocated by the law. Kelsen identifies an insurmountable problem in the theory formulated by Plato, the absence of a material content of the law, ie the notion of justice is based on metaphysical criteria. The material law is absent in the thinking of Greek philosopher and is not intended to justice Kelsen, therefore, a simple rule of proof in the Constitution is not sufficient to achieve justice alone. .