In order to give clearness to his conception of the State, Plato proceeds to trace the first principles of mutual need and of {xxxvi} division of labour in an imaginary community of four or five citizens. Gradually this community increases; the division of labour extends to countries; imports necessitate exports; a medium of exchange is required, and retailers sit in the market-place to save the time of the producers. These are the steps by which Plato constructs the first or primitive State, introducing the elements of political economy by the way. As he is going to frame a second or civilized State, the simple naturally comes before the complex. He indulges, like Rousseau, in a picture of primitive life--an idea which has indeed often had a powerful influence on the imagination of mankind, but he does not seriously mean to say that one is better than the other (cp. Politicus, p. 272); nor can any inference be drawn from the description of the first state taken apart from the second, such as Aristotle appears to draw in the Politics, iv. 4, 12 (cp. again Politicus, 272). We should not interpret a Platonic dialogue any more than a poem or a parable in too literal or matter-of-fact a style. On the other hand, when we compare the lively fancy of Plato with the dried-up abstractions of modern treatises on philosophy, we are compelled to say with Protagoras, that the 'mythus is more interesting' (Protag. 320 D). Several interesting remarks which in modern times would have a place in a treatise on Political Economy are scattered up and down the writings of Plato: cp. especially Laws, v. 740, Population; viii. 847, Free Trade; xi. 916-7, Adulteration; 923-4, Wills and Bequests; 930, Begging; Eryxias, (though not Plato's), Value and Demand; Republic, ii. 369 ff., Division of Labour. The last subject, and also the origin of Retail Trade, is treated with admirable lucidity in the second book of the Republic. But Plato never combined his economic ideas into a system, and never seems to have recognized that Trade is one of the great motive powers of the State and of the world. He would make retail traders only of the inferior sort of citizens (Rep. ii. 371; cp. Laws, viii. 847), though he remarks, quaintly enough (Laws, ix. 918 D), that 'if only the best men and the best women everywhere were compelled to keep taverns for a time or to carry on retail trade, etc., then we should knew how pleasant and agreeable all these things are.'