Biological analogies in history

An American who, in response to such an invitation as I have received, speaks in this university of ancient renown, cannot but feel with peculiar vividness the interest and char...

As in biology, so in human history, a new form may result from the specialization of a long-existing, and hitherto very slowly changing, generalized or non-specialized form; as,...

Contrast this persistence of the old type in its old home, and in certain lands which it had conquered, with its utter disappearance in certain other lands where it was intrusiv...

But in addition to these problems, the most intimate and important of all, and which to a larger or less degree affect all the modern nations somewhat alike, we of the great nat...