Essentially an inquiry into morality, the Republic is the central work of the Western world's most famous philosopher. Containing crucial arguments and insights into many other areas of philosophy, it is also a literary masterpiece: the philosophy is presented for the most part for ordinary readers, who are carried along by the wit and intensity of the dialogue and by Plato's unforgettable images of the human condition. This lucid translation is complemented by full explanatory notes and a critical introduction.