Answer:
Idealistic philosophy was his core.
Explanation:
Plato the philosopher of thought and thinkingness. The methodic search for knowledge is part of his legacy.
About politics, he wrote The Republic, he's biggest work. There he talks abou justice as the main core to government to rule. He tries to respond questions like What is a fair State?, Who is a fair individual?. Here he wrote: 'The best achievement of injustice is to seem fair without being'.
According to this point of view, he begins to create an Ideal State, where organs exist for specific purposes.