ity is combined some degree of sexual indifference, or
when passion is shown, it is not unfrequently for some specimen of a
coarser type. This is certainly the case with horses and with dogs.

It will be easily understood that these difficulties, which are so
formidable in the case of plants and animals, which we can mate as
we please and destroy when we please, would make the maintenance of
a highly-selected breed of men an impossibility.

Whenever a low race is preserved under conditions of life that exact
a high level of efficiency, it must be subjected to rigorous
selection. The few best specimens of that race can alone be allowed
to become parents, and not many of their descendants can be allowed
to live. On the other hand, if a higher race be substituted for the
low one, all this terrible misery disappears. The most merciful form
of what I ventured to call "eugenics" would consist in watching for
the indications of superior strains or races, and in so favouring
them that their progeny shall outnumber and gradually replace that
of the old one. Such strains are of no infrequent occurrence. It is
easy to specify families who are characterised by strong resemblances,
and whose features and character are usually prepotent over those of
their wives or husbands in their joint offspring, and who are at the
same time as prolific as the average of their class. These strains
can be conveniently studied in the families of exiles, which, for
obvious reasons, are easy to trace in their various branches.

The debt that most countries owe to the race of men whom they
received from one another as immigrants, whether leaving their
native country of their own free will, or as exiles on political or
religious grounds, has been often pointed out, and may, I think, be
accounted for as follows:--The fact of a man leaving his compatriots,
or so irritating them that they compel him to go, is fair evidence
that either he or they, or both, feel that his character is alien to
theirs. Exiles are also on the whole men of considerable force of
character; a quiet man would endure and succumb, he would not have
energy to transplant himself or to become so conspicuous as to be an
object of general attack. We may justly infer from this, that exiles
are on the whole men of exceptional and energetic natures, and it is
especially from such men as these that new strains of race are likely
to proceed.

INFLUENCE OF MAN UPON RACE.

The influe