Explain why Plato thinks Philosophers should be Kings?

Plato's strategy in the Republic is to explicate the primary notion of societal or political justice and then parallel it to the concept of individual justice. Before he can prove that justice is a good thing, Plato must first state its definition, by showing justice in its perfect form in order to discover the true essence of it. Therefore, Socrates claims that the only way to have a perfect state is if the state has a perfect leader, thus he introduces the concept of the philosopher-king.
Plato identifies political justice as harmony in a structured political body. An ideal state consis…