The consequence of this racial purity, universally valid in
Nature, is not only the sharp outward delimitation of the various
races, but their uniform character in themselves. The fox is always
a fox, the goose a goose, the tiger a tiger, etc., and the
difference can lie at most in the varying measure of force,
strength, intelligence, dexterity, endurance, etc., of the
individual specimens. But you will never find a fox who in his
inner attitude might, for example, show humanitarian tendencies
toward geese, as similarly there is no cat with a friendly
inclination toward mice.
Therefore, here, too, the struggle among themselves arises less
from inner aversion than from hunger and love. In both cases,
Nature looks on calmly, with satisfaction, in fact. In the struggle
for daily bread all those who are weak and sickly or less
determined succumb, while the struggle of the males for the female
grants the right or opportunity to propagate only to the
healthiest. And struggle is always a means for improving a species'
health and power of resistance and, therefore, a cause of its
higher development.
If the process were different, all further and higher development
would cease and the opposite would occur. For, since the inferior
always predominates numerically over the best, if both had the same
possibility of preserving life and propagating, the inferior would
multiply so much more rapidly that in the end the best would
inevitably be driven into the background, unless a correction of
this state of affairs were undertaken. Nature does just this by
subjecting the weaker part to such severe living conditions that by
them alone the number is limited, and by not permitting the
remainder to increase promiscuously, but making a new and ruthless
choice according to strength and health.
No more than Nature desires the mating of weaker with stronger
individuals, even less does she desire the blending of a higher
with a lower race, since, if she did, her whole work of higher
breeding, over perhaps hundreds of thousands of years, night be
ruined with one blow.
Historical experience offers countless proofs of this. It shows
with terrifying clarity that in every mingling of Aryan blood with
that of lower peoples the result was the end of the cultured
people. North America, whose population consists in by far the
largest part of Germanic elements who mixed but little with the
lower colored peoples, shows a different humanity and culture from
Central and South America, where the predominantly Latin immigrants
often mixed with the aborigines on a large scale. By this one
example, we can clearly and distinctly recognize the effect of
racial mixture. The Germanic inhabitant of the American continent,
who has remained racially pure and unmixed, rose to be master of
the continent; he will remain the master as long as he does not
fall a victim to defilement of the blood.