The strength of monasticism lay in its appeal to many different classes of persons. The world became a less attractive place as the successive invasions of the barbarians brought ever-increasing disorder. The monastery was the natural refuge not only of the spiritually minded, but of those of a studious or contemplative disposition who disliked the life of a soldier and were disinclined to face the dangers and uncertainties of the times. The monastic life was safe and peaceful, as well as holy. Even the rude and unscrupulous warriors hesitated to destroy the property or disturb the life of those who were believed to enjoy Heaven's special favor. The monastery furnished, too, a refuge for the disconsolate, an asylum for the disgraced, and food and shelter for the indolent who would otherwise have had to earn their living. There were, therefore, many motives which helped to fill the monasteries. Kings and nobles, for the good of their souls, readily gave land upon which to found colonies of monks, and there were plenty of remote spots in the mountains and forests to tempt the recluse. [Sidenote: Necessity for the regulation of monastic life.] Monastic communities first developed on a large scale in Egypt in the fourth century. Just as the Germans were winning their first great victory at Adrianople, St. Jerome was engaged in showing the advantages of the ascetic Christian life, which was a new thing in the West. In the sixth century monasteries multiplied so rapidly in western Europe that it became necessary to establish definite rules for the numerous communities which proposed to desert the ordinary ways of the world and lead a peculiar life apart. The monastic regulations which had been drawn up in the East did not answer the purpose, for the climate of the West and the temperament of the Latin peoples differed too much from those of the Orient. Accordingly St. Benedict drew up, about the year 526, a sort of constitution for the monastery of Monte Cassino, in southern Italy, of which he was the head. This was so sagacious, and so well met the needs of the monastic life, that it was rapidly accepted by the other monasteries and gradually became the "rule" according to which all the western monks lived.[31] [Sidenote: The Rule of St. Benedict.]