Plato, though by no means the first philosopher, undoubtedly is one of the earliest to leave us a significant body of work. He spent most of his time asking and providing answers to questions that have always troubled people. Even centuries after his death, if we think of politics and the problems of living together, the issues that confront us again and again very often involve the sorts of questions that Plato's Republic can help us think about in a more focused and sophisticated way. Hence, Plato is considered the most influential political philosopher of all times.