Who wrote the Republic what was it about?

The Republic was written by the Greek philosopher Plato. It discussed the meaning of justice and proposed a society ruled by philosopher kings. Also included his very famous cave allegory. This allegory described people who lived chained facing a blank wall. The people just watched shadows and this was supposed to be as close as they got to seeing reality. He believes that the philosopher is freed from this "cave" and can understand that the shadows are not reality.