Also in “Self-Constitution in the Ethics of Plato and Kant”, by Christine Korsgaard, Plato's constitutional model says that the procedures that unify a city are based on the actions that unify a person's soul. This makes a city appear to be an agent, "it is not just a place to live, but rather a kind of agent which performs actions and so has a life and a history. And we can see the same three parts in a political decision" (Korsgaard 105). Plato believes that reason is used so people can be well-functioning agents. He says that when people have decisions to make, reason has to come in and choose which desire or appetite is best to act on. Then, the spirit of a person has to commit to the desire reason has picked, and follow through the action.
