The dangerous fallacy in that short-sighted idealism which seeks to make America the haven of refuge for the poor and oppressed of all lands, and its evil effects not only on America but on the rest of the world as well, has been convincingly exposed by Professor Ross. He has scant patience with those social "uplifters" whose sympathy with the visible alien at the gate is so keen that they have no feeling for the _invisible_ children of _our_ poor who will find the chances gone, nor for those at the gate of the to-be, who might have been born, but will not be. "I am not of those," he writes, "who consider humanity and forget the nation, who pity the living but not the unborn. To me, those who are to come after us stretch forth beseeching hands as well as do the masses on the other side of the globe. Nor do I regard America as something to be spent quickly and cheerfully for the benefit of pent-up millions in the backward lands. What if we become crowded without their ceasing to be so? I regard it (America) as a nation whose future may be of unspeakable value to the rest of mankind, provided that the easier conditions of life here be made permanent by high standards of living, institutions, and ideals, which finally may be appropriated by all men. We could have helped the Chinese a little by letting their surplus millions swarm in upon us a generation ago; but we have helped them infinitely more by protecting our standards and having something worth their copying when the time came."[155] The perturbing influence of recent immigration must vex American life for many decades. Even if laws are passed to-morrow so drastic as to shut out permanently the influx of undesirable elements, it will yet take several generations before the combined action of assimilation and elimination shall have restabilized our population and evolved a new type-norm approaching in fixity that which was on the point of crystallizing three-quarters of a century ago. The biologist Humphrey thus punctures the "melting-pot" delusion: "Our 'melting-pot,'" he writes, "would not give us in a thousand years what enthusiasts expect of it--a _fusing_ of all our various racial elements into a new type which shall be the true American. It _will_ give us for many generations a perplexing diversity in ancestry, and since our successors must reach back into their ancestry for characteristics, this diversity will increase the uncertainty of their inheritances. They will inherit no stable blended character, because there is no such thing. They will inherit from a mixture of unlike characteristics contributed by unlike peoples, and in their inheritance they will have certain of these characteristics in full identity, while certain others they will not have at all."[156]