The Republic (Greek: Πολιτεία, Politeia; Latin: De Republica) is a Socratic dialogue, written by Plato around 380 BC, concerning the definition of justice (δικαιοσύνη), the order and character of the just city-state and the just man, reason by which ancient readers used the name On Justice as an alternative title (not to be confused with the spurious dialogue also titled On Justice). The dramatic date of the dialogue has been much debated and though it must take place some time during the Peloponnesian War, “there would be jarring anachronisms if any of the candidate specific dates between 432 and 404 were assigned”. It is Plato’s best-known work and has proven to be one of the most intellectually and historically influential works of philosophy and political theory. In it, Socrates along with various Athenians and foreigners discuss the meaning of justice and examine whether or not the just man is happier than the unjust man by considering a series of different cities coming into existence “in speech”, culminating in a city (Kallipolis) ruled by philosopher-kings; and by examining the nature of existing regimes. The participants also discuss the theory of forms, the immortality of the soul, and the roles of the philosopher and of poetry in society. (Wikipedia)
Feast away in triumph, and take your fill of the argument; I will not oppose you, lest I should displease the company.
Well then, proceed with your answers, and let me have the remainder of my repast. For we have already shown that the just are clearly wiser and better and abler than the unjust, and that the unjust are incapable of common action; naying at more, that to speak as we did of men who are evil acting at any time vigorously together, is not strictly true, for if they had been perfectly evil, they would have laid hands upon one another; but it is evident that there must have been some remnant of justice in them, which enabled them to combine; if there had not been they would have injured one another as well as their victims; they were but half-villains in their enterprises; for had they been whole villains, and utterly unjust, they would have been utterly incapable of action. That, as I believe, is the truth of the matter, and not what you said at first. But whether the just have a better and happier life than the unjust is a further question which we also proposed to consider. I think that they have, and for the reasons which to have given; but still I should like to examine further, for no light matter is at stake, nothing less than the rule of human life.