Plato thinks the second alternative is the right one. God's desire doesn't MAKE a thing good or bad. Individuals and Ethics In Plato's Republic, the four cardinal virtues are wisdom, temperance, courage and justice. These reflect the nature of the soul. The soul has three parts.
Justice consists of the proper interplay of the three parts of the soul.
Society and Ethics In Plato's Republic, society mirrors the individual soul. And the virtues of society mirror the virtues of the individual soul. Society has three groups. Justice in society is the proper conformity of the three groups to their social roles. Each group has its own place, according to its natural abilities.