On the other hand, none of the colored races shows perceptible signs of declining birth-rate, all tending to breed up to the limits of available subsistence. Such checks as now limit the increase of colored populations are wholly external, like famine, disease, and tribal warfare. But by a curious irony of fate, the white man has long been busy removing these checks to colored multiplication. The greater part of the colored world is to-day under white political control. Wherever the white man goes he attempts to impose the bases of his ordered civilization. He puts down tribal war, he wages truceless combat against epidemic disease, and he so improves communications that augmented and better distributed food-supplies minimize the blight of famine. In response to these life-saving activities the enormous death-rate which in the past has kept the colored races from excessive multiplication is falling to proportions comparable with the death-rate of white countries. But to lower the colored world's prodigious birth-rate is quite another matter. The consequence is a portentous increase of population in nearly every portion of the colored world now under white political sway. In fact, even those colored countries which have maintained their independence, such as China and Japan, are adopting the white man's life-conserving methods and are experiencing the same accelerated increase of population. Now what must be the inevitable result of all this? It can mean only one thing: a tremendous and steadily augmenting outward thrust of surplus colored men from overcrowded colored homelands. Remember that these homelands are already populated up to the available limits of subsistence. Of course present limits can in many cases be pushed back by better living conditions, improved agriculture, and the rise of modern machine industry such as is already under way in Japan. Nevertheless, in view of the tremendous population increases which must occur, these can be only palliatives. Where, then, should the congested colored world tend to pour its accumulating human surplus, inexorably condemned to emigrate or starve? The answer is: into those emptier regions of the earth under white political control. But many of these relatively empty lands have been definitely set aside by the white man as his own special heritage. The upshot is that the rising flood of color finds itself walled in by white dikes debarring it from many a promised land which it would fain deluge with its dusky waves. Thus the colored world, long restive under white political domination, is being welded by the most fundamental of instincts, the instinct of self-preservation, into a common solidarity of feeling against the dominant white man, and in the fire of a common purpose internecine differences tend, for the time at least, to be burned away. Before the supreme fact of white political world-domination, antipathies within the colored world must inevitably recede into the background.