cation, all these are for the real
purpose of establishing and promoting national integrity. No nation
exists long without ideals and traditions, without teachers, artists,
poets, and yet the primary condition of the existence of all these is
a great body of citizens characterized by physical and mental
soundness--vigor and sanity. In searching for guiding principles in
their great endeavors the sociologist and statesman have sought aid
from many sources. But, as Pearson points out, Philosophy has thus far
given no law by the aid of which we can understand how a nation
becomes physically and mentally vigorous. Anthropology has done little
to show wherein exists human fitness as a social organism. Political
Economists object that they are not listened to with respectful
consideration in legislative chambers. History is the favorite hunting
ground of the statesman searching for guidance; but unfortunately
history teaches chiefly by example and analogy, rarely by true
explanation. And just as some gifted persons are able to give an apt
Biblical quotation touching any occurrence whatever, so, many
statesmen can cite some historical analogue which they offer as
evidence for their views, whatever they are. These men are sincere, in
their ignorance of the nature of scientific proof. Finally, although
the Statesman still holds rather aloof, the Sociologist comes now to
the Biologist, inquiring whether by any chance he may be in possession
of data or guiding principles which may be somehow of service in the
building of stable societies. The Biologist does not send him away
without contribution. The Sociologist makes known his needs, the
Biologist displays his possessions, and it is at once evident to both
that they have much in common, and that each is able to supply the
other with some needed wares. Each may learn from the other; and best
of all, the Biologist seems to have information which can be of the
greatest service in their common work of building sound societies.

And the biologist is grateful to the sociologist for reminding him
that he, too, has sacred duties in this direction. He is too often
forgetful that the real aim of his own, as of any science, is to be
useful in real human life. It is pleasing to the biologist to feel
that he is at last in possession of facts of value to the student of
human society, for to him his debt is great. From the sociologist he
has drawn the inspirations which have led to some of his