One part of the political system focuses on specialization, the idea that each person would perform that "job" for which he is most suited. He would then stick to that job and that would satisfy him and thus keep structural order. Once this specialization occurs, there will be classes in the city and each class will do what it needs to do to make the city run smoothly: warriors, rulers, and producers will keep the city functioning smoothly. Rulers will make the rules, warriors will carry out the rulers' commands, and producers will only figure out how their production helps the city. Socrates believes that if the city is set up this way, it will be a just city.