The moral cause was the impulse derived from religious sentiments and creed. Since the end of the seventh century, Christianity had fought against Mohammedanism, and had conquered it in Europe, after being fearfully menaced by it; it had succeeded in restricting it to Spain. Thence also it was constantly labouring to expel it. The crusades have been represented as a sort of accident, as an unforeseen and unbruited event, brought about by the recitals of pilgrims on their return from Jerusalem, and the preachings of Peter the Hermit. Nothing of the kind. The crusades were the continuation and apogœum of the great contest carried on for four centuries between Christianity and Mohammedanism. The theatre of that contest had previously been in Europe, then it was transported into Asia. If I put any value on those comparisons and parallels in which people sometimes delight to press, suitably or unsuitably, historical facts, I might exhibit Christianity as running in Asia exactly the same career, and undergoing the same fate, as Mohammedanism in Europe. Mohammedanism was established in Spain, where it conquered and founded a kingdom and principalities. The Christians did that also in Asia, and they found themselves, with regard to the Mohammedans, in the same position as the latter in Spain with regard to the Christians. The kingdom of Jerusalem and that of Grenada precisely corresponded. However, such likenesses or similitudes are of very little consequence. The great fact was the contest of the two religious and social systems. The crusades were its main and culminating crisis. In that is their historical character, the bond which unites them to the entirety of affairs. {145} Another cause, the social state of Europe in the eleventh century, equally contributed to their breaking forth. I have been particular in explaining why nothing of a general nature could gain establishment in Europe from the fifth to the eleventh century, and I endeavoured to show how completely the local system prevailed, and within what narrow limits states, existences, and minds were confined. The feudal system had effected that. After some time, limits so narrow no longer satisfied; human thought and activity were eager to overleap the bounds to which they were restricted. The wandering life had ceased, but not the taste for its excitement and adventures. The populations rushed to the crusades as to a new existence, wider and more varied than their own, pleasurable to them as both recalling the ancient liberty of barbarism, and opening out vast prospects for the future.