The concessions to common sense and to contemporary schools of thought, already pointed out in those Dialogues which we suppose to have been written after the _Republic_, are still more conspicuous in the _Laws_. We do not mean merely the project of a political constitution avowedly offered as the best possible in existing circumstances, though not the best absolutely; but we mean that there is throughout a desire to present philosophy from its most intelligible, practical, and popular side. The extremely rigorous standard of sexual morality (p. 838) seems, indeed, more akin to modern than to ancient notions, but it was in all probability borrowed from the naturalistic school of ethics, the forerunner of Stoicism; for not only is there a direct appeal to Nature’s teaching in that connexion; but throughout the entire work the terms ‘nature’ and ‘naturally’ occur with greater frequency, we believe, than in all the rest of Plato’s writings put together. When, on the other hand, it is asserted that men can be governed by no other motive than pleasure (p. 663, B), we seem to see in this declaration a concession to the Cyrenaic school, as well as a return to the forsaken standpoint of the _Protagoras_. The increasing influence of Pythagoreanism is shown by the exaggerated importance attributed to exact numerical determinations. The theory of ideas is, as Prof. Jowett observes, entirely absent, its place being taken by the distinction between mind and matter.[159] The political constitution and code of laws recommended by Plato to his new city are adapted to a great extent from the older legislation of Athens. As such they have supplied the historians of ancient jurisprudence with some valuable indications. But from a philosophic point of view the general impression produced is wearisome and even offensive. A universal system of espionage is established, and the odious trade of informer receives ample encouragement. Worst of all, it is proposed, in the true spirit of Athenian intolerance, to uphold religious orthodoxy by persecuting laws. Plato had actually come to think that disagreement with the vulgar theology was a folly and a crime. One passage may be quoted as a warning to those who would set early associations to do the work of reason; and who would overbear new truths by a method which at one time might have been used with fatal effect against their own opinions:—