Anglo-Saxon Britain by Grant Allen

It was impossible that a country lying within sight of the orthodox Frankish kingdom, and enclosed between two Christian Churches on either side, should long remain in such a state of isolated heathendom. For to be cut off from Christendom was to be cut off from the whole social, political, intellectual, and commercial life of the civilised world. In Britain, as distinctly as in the Pacific Islands in our own day, the missionary was the pioneer of civilisation. The change which Christianity wrought in England in a few generations was almost as enormous as the change which it has wrought in Hawaii at the present time. Before the arrival of the missionary, there was no written literature, no industrial arts, no peace, no social intercourse between district and district. The church came as a teacher and civiliser, and in a few years the barbarous heathen English warrior had settled down into a toilsome agriculturist, an eager scholar, a peaceful law-giver, or an earnest priest.

The change was not merely a change of religion, it was a revolution from a life of barbarism to a life of incipient culture, and slow but progressive civilisation.