However, guesses as to the final outcome of an Indian-mongrel conflict are academic speculation, because mongrel America will not be left to itself. Mongrel America cannot stand alone. Indeed, it never has stood alone, for it has always been bolstered up by the Monroe Doctrine. But for our protection, outside forces would have long since rushed into this political and economic vacuum, and every omen to-day denotes that this vacuum, like all others, will presently be filled. A world close packed as never before will not tolerate countries that are a torment to themselves and a dangerous nuisance to their neighbors. A world half bankrupt will not allow vast sources of potential wealth to lie in hands which idle or misuse. Thus it is practically certain that mongrel America will presently pass under foreign tutelage. Exactly how, is not yet clear. It may be done by the United States alone, or, what is more probable, in "Pan-American" co-operation with the lusty young white nations of the antipodean south. It may be done by an even larger combination, including some European states. After all, the details of such action do not lie within the scope of this book, since they fall exclusively within the white man's sphere of activity. There is, however, another dynamic which might transform mongrel America. This dynamic is yellow Asia. The Far East teems with virile and laborious life. It thrills to novel ambitions and desires. Avid with the urge of swarming myriads, it hungrily seeks outlets for its superabundant vitality. We have already seen how the Mongolian has earmarked the whole Far East for his own, and in subsequent pages we shall see how he also beats restlessly against the white world's race-frontiers. But mongrel America! What other field offers such tempting possibilities for Mongolian race-expansion? Vast regions of incalculable, unexploited wealth, sparsely inhabited by stagnant populations cursed with anarchy and feeble from miscegenation--how could such lands resist the onslaught of tenacious and indomitable millions? The answer is self-evident. They could not resist; and such an invasion, once begun, would be consummated with a celerity and thoroughness perhaps unexampled in human history.