An interesting monument of this new species of literature, in what we may view as a transition stage, is the _Gesta Romanorum_,[684] a collection of moral stories invented by the monks in their idle hours. These tales are a curious mixture of things Roman, monastic, and knightly. But for a true expression of this romance literature we must turn to the legends of the Holy Grail, in which a lofty imagination blends, in so far as they can be blended, all the varied elements of the knightly ideal in a consistent whole. No age save the age of Christian knighthood could have produced this wonderful cycle of tales. [Sidenote: Contribution of chivalry to the moral heritage of the Christian world] But it is neither in the crusading enterprises nor in the literary products of the age of chivalry that we are to look for the real historical significance of the ideal of chivalry. Its chief import for the moral evolution of the European nations lies in the fact that it helped to give fuller and richer content to the Christian ideal by contributing to it, or by giving a surer place in it, certain nontheological virtues, some of which the Church had laid little emphasis upon or had entirely neglected. Thus the enthusiasm for the ideal of chivalry, like the Church’s veneration of the Holy Virgin,[685] tended to elevate and refine the ideal of woman, and thus to counteract certain tendencies of the ascetic ideal. It helped to give a high valuation to the moral qualities of loyalty, truthfulness, magnanimity, self-reliance, and courtesy. We designate these attractive traits of character as chivalrous virtues for the reason that we recognize that knighthood made precious contributions to these elements of the moral inheritance which the modern received from the medieval world. [Sidenote: Restrictions on the right of private war: the Truce of God] Very closely connected ethically and historically with chivalry is the movement during the later medieval time for the abolition of the right of private war.[686] In the tenth century, as feudalism developed and the military spirit of knighthood came more and more to dominate society, the right of waging war, with which privilege every feudal lord of high rank was invested, resulted in a state of intolerable anarchy in all those lands where the feudal system had become established. Respecting this right, claimed and exercised by the feudal prince, of waging war against any and every other chieftain, even though this one were a member of the same state as that to which he himself belonged, there was in these medieval centuries precisely the same moral feeling, or rather lack of moral feeling, that exists to-day in regard to the right claimed and exercised by the different independent nations of waging war against one another.