The professed subject is--What is Justice? Is the just man happy in or by reason of his justice? whatever consequences may befall him? Is the unjust man unhappy by reason of his injustice? But the ground actually travelled over by Sokrates, from whose mouth the exposition proceeds, is far more extensive than could have been anticipated from this announced problem. An immense variety of topics, belonging to man and society, is adverted to more or less fully. A theory of psychology or phrenology generally, is laid down and advocated: likewise a theory of the Intellect, distributed into its two branches: 1. Science, with the Platonic Forms or Ideas as Realities corresponding to it; 2. Opinion, with the fluctuating semi-realities or pseudo-realities, which form its object. A sovereign rule, exercised by philosophy, is asserted as indispensable to human happiness. The fundamental conditions of a good society, as Plato conceived it, are set forth at considerable length, and contrasted with the social corruptions of various existing forms of government. The outline of a perfect education, intellectual and emotional, is drawn up and prescribed for the ruling class: with many accompanying remarks on the objectionable tendencies of the popular and consecrated poems. The post-existence, as well as the pre-existence of the soul, is affirmed in the concluding books. As the result of the whole, Plato emphatically proclaims his conviction, that the just man is happy in and through his justice, quite apart from all consideration of consequences--yet that the consequences also will be such as to add to his happiness, both during life as well as after death: and the unjust man unhappy in and through his injustice.[1] [Footnote 1: Plat. Repub. i. pp. 328 A, 350 D, 354 A.] [Side-note: Personages of the dialogue.] The dramatic introduction of the dialogue (which is described as held during the summer, immediately after the festival of the Bendideia in Peiræus), with the picture of the aged Kephalus and his views upon old age, is among the richest and most spirited in the Platonic works: but the discussion does not properly begin until Kephalus retires, leaving it to be carried on by Sokrates with Polemarchus, Glaukon, Adeimantus, and Thrasymachus. [Side-note: Views of Kephalus about old age.]