There have been theories in modern as well as in ancient times which have a family likeness to the speculations of Glaucon; e.g. that power is the foundation of right; or that a monarch has a divine right to govern well or ill; or that virtue is self-love or the love of power; or that war is the natural state of man; or that private vices are public benefits. All such theories have a kind of plausibility from their partial agreement with experience. For human nature oscillates between good and evil, and the motives of actions and the origin of institutions may be explained to a certain extent on either hypothesis according to the character or point of view of a particular thinker. The obligation of maintaining authority under all circumstances and sometimes by rather questionable means is felt strongly and has become a sort of instinct among civilized men. The divine right of kings, or more generally of governments, is one of the forms under which this natural feeling is expressed. Nor again is there any evil which has not some accompaniment of good or pleasure; nor any good {xxix} which is free from some alloy of evil; nor any noble or generous thought which may not be attended by a shadow or the ghost of a shadow of self-interest or of self-love. We know that all human actions are imperfect; but we do not therefore attribute them to the worse rather than to the better motive or principle. Such a philosophy is both foolish and false, like that opinion of the clever rogue who assumes all other men to be like himself (iii. 409 C). And theories of this sort do not represent the real nature of the State, which is based on a vague sense of right gradually corrected and enlarged by custom and law (although capable also of perversion), any more than they describe the origin of society, which is to be sought in the family and in the social and religious feelings of man. Nor do they represent the average character of individuals, which cannot be explained simply on a theory of evil, but has always a counteracting element of good. And as men become better such theories appear more and more untruthful to them, because they are more conscious of their own disinterestedness. A little experience may make a man a cynic; a great deal will bring him back to a truer and kindlier view of the mixed nature of himself and his fellow men.