This
paper reviews the discussion regarding
justice in Book 4 of "The Republic". Justice was then defined as residing in the ability of everyone in the state to do his own job and not to interfere with other
people's functions. In order to understand this work, the paper looks at Plato's definition of the people that make up
society. Plato defines the first two
parts of the
soul as desire and reason and the third as emotion and then relates this to the four parts that make up the populous.