In the welding together of primitive shifting tribes into stable and powerful nations, we can seem to discern three different methods that have been followed at different times and places, with widely different results.  In all cases the fusion has been effected by war, but it has gone on in three broadly contrasted ways.  The first of these methods, which has been followed from time immemorial in the Oriental world, may be roughly described as conquest without incorporation. A tribe grows to national dimensions by conquering and annexing its neighbours, without admitting them to a share in its political life.  Probably there is always at first some incorporation, or even perhaps some crude germ of federative alliance; but this goes very little way,—­only far enough to fuse together a few closely related tribes, agreeing in speech and habits, into a single great tribe that can overwhelm its neighbours.  In early society this sort of incorporation cannot go far without being stopped by some impassable barrier of language or religion.  After reaching that point, the conquering tribe simply annexes its neighbours and makes them its slaves.  It becomes a superior caste, ruling over vanquished peoples, whom it oppresses with frightful cruelty, while living on the fruits of their toil in what has been aptly termed Oriental luxury.  Such has been the origin of many eastern despotisms, in the valleys of the Nile and Euphrates, and elsewhere.  Such a political structure admits of a very considerable development of material civilization, in which gorgeous palaces and artistic temples may be built, and perhaps even literature and scholarship rewarded, with money wrung from millions of toiling wretches.  There is that sort of brutal strength in it, that it may endure for many long ages, until it comes into collision with some higher civilization.  Then it is likely to end in sudden collapse, because the fighting quality of the people has been destroyed.  Populations that have lived for centuries in fear of impalement or crucifixion, and have known no other destination for the products of their labour than the clutches of the omnipresent tax-gatherer, are not likely to furnish good soldiers.  A handful of freemen will scatter them like sheep, as the Greeks did twenty-three centuries ago at Kynaxa, as the English did the other day at Tel el-Kebir.  On the other hand, where the manliness of the vanquished people is not crushed, the sway of the conquerors who cannot enter into political union with them is likely to be cast off, as in the case of the Moors in Spain.  There was a civilization in many respects admirable.  It was eminent for industry, science, art, and poetry; its annals are full of romantic interest; it was in some respects superior to the Christian system which supplanted it; in many ways it contributed largely to the progress of the human race; and it was free from some of the worst vices of Oriental civilizations.  Yet because of the fundamental defect that between the Christian