What Aristotle Learned from Plato about Justice and Laws

In this paper I consider Aristotle’s solutions to two questions about justice and the laws: why think that obeying the law is just? And why think that doing what is just will promote one’s happiness? I analyze Aristotle’s solutions to these two problems in terms of four claims concerning the laws that come from Plato and underwrite Aristotle’s optimism about the potential for politikê epistêmê to issue in laws which are objectively correct.