18 What is more, innumerable Benedictines went forth from these monastic walls and with cross and plow, by prayer, that is, and labor, brought the light of Christian civilization to those lands as yet wrapped in darkness. By their long untiring labors, the forests, once the vast domain of wild beasts, almost inaccessible to man, were turned into fruitful land and cultivated fields; and what had been up to that time separate, scattered tribes of rough barbarous customs became in the course of time a nation, tamed by the gentle power of the Gospel and outstanding for its Christianity and civilization.
Source: Ecclesiae Fastos (Vatican.va)