How did these modern nations arise in the transformation of the Roman Empire from its old simple pagan condition to one complex Christian civilization? How came there to be also nations exterior to the Empire; old nations like Ireland, new nations like Poland? We must be able to answer this question if we are to understand, not only that European civilization has been continuous (that is, one in time as well as one in spirit and in place), but also if we are to know why and how that continuity was preserved. For one we are and will be, all Europeans. The moment something threatens our common morals from within, we face it, however tardily. We have forgotten what it is to feel a threat from without: but it may come.
We are already familiar with the old popular and false explanation of the rise of the European nations. This explanation tells us that great numbers of vigorous barbarians entered the Roman Empire, conquered it, established themselves as masters, and parceled out its various provinces.
We have seen that such a picture is fantastic and, when it is accepted, destroys a man’s historic sense of Europe.
We have seen that the barbarians who burst through the defence of civilization at various times (from before the beginnings of recorded history; through the pagan period prefacing Our Lord’s birth; during the height of the Empire proper, in the third century; again in the fourth and the fifth) never had the power to affect that civilization seriously, and therefore were invariably conquered and easily absorbed. It was in the natural course of things this should be so.
I say “in the natural course of things.” Dreadful as the irruption of barbarians into civilized places must always be, even on a small scale, the conquest of civilization by barbarians is always and necessarily impossible. Barbarians may have the weight to destroy the civilization they enter, and in so doing to destroy themselves with it. But it is inconceivable that they should impose their view and manner upon civilized men. Now to impose one’s view and manner, dare leges (to give laws), is to conquer.
Moreover, save under the most exceptional conditions, a civilized army with its training, discipline and scientific traditions of war, can always ultimately have the better of a horde. In the case of the Roman Empire the armies of civilization did, as a fact, always have the better of the barbarian hordes. Marius had the better of the barbarians a hundred years before Our Lord was born, though their horde was not broken until it had suffered the loss of 200,000 dead. Five hundred years later the Roman armies had the better of another similar horde of barbarians, the host of Radagasius, in their rush upon Italy; and here again the vast multitude lost some 200,000 killed or sold into slavery. We have seen how the Roman generals, Alaric and the others, destroyed them.
But we have also seen that within the Roman Army itself certain auxiliary troops (which may have preserved to some slight extent traces of their original tribal character, and probably preserved for a generation or so a mixture of Roman speech, camp slang, and the original barbaric tongues) assumed greater and greater importance in the Roman Army towards the end of the imperial period—that is, towards the end of the fourth, and in the beginning of the fifth, centuries (say, 350-450).
We have seen why these auxiliary forces continued to increase in importance within the Roman Army, and we have seen how it was only as Roman soldiers, and as part of the regular forces of civilization, that they had that importance, or that their officers and generals, acting as Roman officers and generals, could play the part they did.
The heads of these auxiliary forces were invariably men trained as Romans. They knew of no life save that civilized life which the Empire enjoyed. They regarded themselves as soldiers and politicians of the State in which—not against which—they warred. They acted wholly within the framework of Roman things. The auxiliaries had no memory or tradition of a barbaric life beyond the Empire, though their stock in some part sprang from it; they had no liking for barbarism, and no living communication with it. The auxiliary soldiers and their generals lived and thought entirely within those imperial boundaries which guarded paved roads, a regular and stately architecture, great and populous cities, the vine, the olive, the Roman law and the bishoprics of the Catholic Church. Outside was a wilderness with which they had nothing to do.
Armed with this knowledge (which puts an end to any fantastic theory of barbarian “conquest”), let us set out to explain that state of affairs which a man born, say, a hundred years after the last of the mere raids into the Empire was destroyed under Radagasius, would have observed in middle age.