If you were told that in a certain planet revolving round Sirius there is a race of donkeys who talk the English language and spend their time in discussing eugenics, you could not disprove the statement, but would it, on that account, have any claim to be believed?

Nor is it true that war in these days encourages eugenics by promoting the survival of the fittest.

There is no such difficulty in investigating animal eugenics, because the generations of horses, cattle, dogs, etc., are brief, and the breeder of any such stock lives long enough to acquire a large amount of experience from his own personal observation.

It seems free from metaphysical considerations, and it has none of those disconcerting personal applications, those penetrations towards intimate qualities, that makes eugenics, for example, faintly but persistently uncomfortable.

Yet all of the practical net result has been summed up in the term "negative eugenics," the eugenics of prohibition and warning.