The continuance of the stage villain is worthy of some note beyond its evidence of conventionalization. It calls attention to the fact that English tragedy has always been largely concerned with evil persons. Though the utterly bad were condemned as tragic figures by Aristotle, and the overthrow of the wicked as a tragic theme has ever since been held in some contempt by theorizers; yet from the time of Marlowe, or even earlier, English tragedy has told the stories of evil-doers with careers of cruelty or lust, or of machinators who have turned to bitterness and disaster the lives of the pure and the good. Of the first class are the tyrants, usurpers, lustful monarchs, and bloody avengers; of the second, the Machiavellian prime ministers, the hypocritical counselors, and the traitorous friends; and the two are often united as in Barabas or Richard III. English authors, actors, and audiences have delighted in a visible representative of the devil upon the stage, in an impersonation of the source of evil. Given grandeur of ambition, the evil one becomes the protagonist; given mere revenge and hatred as motives, he is still the main opponent of the hero. Perhaps the highest kind of tragic feeling is not aroused either by the fall of the depraved or by the ruin of the noble through trickery and cunning, yet "Richard III" and "Macbeth" deal with the one theme, and "Othello" and "Lear" with the other. Shakespeare's tragedies, indeed, represent other conflicts than this between good and evil, and in the representation of that conflict they are not confined by theological or dramatic formulas. Such formulas were just what eighteenth century writers enjoyed, and in attacking the problem of evil they clung to one of the most artificial if also one of the most typical persons in literature, the Elizabethan stage machinator. The conflict of bad and good, a natural if not inevitable motive of a drama descending from medieval times, found its expression in the excessively amiable hero and heroine and the utterly black villain, stage types that have maintained themselves in fiction as well as the drama through Scott and Dickens down to the present day. The stage villain, a theory of poetic justice that refused to punish the good except for some distinctly emphasized fault, and a faith in the potency of moral precepts, these are the devil, providence, and salvation of a theatrical theology, which, along with conventional technic, narrowed plots, and some refinement in moral taste, distinguish the eighteenth century type of tragedy.