The coast of British Columbia was one of the three chief centers of aboriginal America.
According to the now almost universally accepted theory, all the races of mankind had a common origin.
Although farming of any sort was almost as impossible in the plains as in the dry regions of winter rains farther west, the abundance of buffaloes made life much easier in many respects.
Curiously enough man's body and his mind appear to differ in their climatic adaptations.
For the source of any characteristic so widespread and uniform as this adaptation to environment we must go back to the very beginning of the human race.
The human organism inherits so delicate an adjustment to climate that, in spite of man's boasted ability to live anywhere, the strain of the frozen North eliminates the more nervous and active types of mind.
Again and again, to be sure, on the way to America, and under many other circumstances, man has passed through the most adverse climates and has survived, but he has flourished and waxed strong only in certain zones.
Thus the races, though alike in their physical response to climate, may possibly be different in their mental response because they have approached America by different paths.
Although mountains may guide migrations, the plains are the regions where people dwell in greatest numbers.
America forms the longest and straightest bone in the earth's skeleton.
Year by year we are learning that in this restless, strenuous American life of ours vacations are essential.
No part of the world can be truly understood without a knowledge of its garment of vegetation, for this determines not only the nature of the animal inhabitants but also the occupations of the majority of human beings.
The buffalo is a surprisingly stupid animal.
History in its broadest aspect is a record of man's migrations from one environment to another.
The evidence points to central Asia as man's original home, for the general movement of human migrations has been outward from that region and not inward.
Geologists are rapidly becoming convinced that the mammals spread from their central Asian point of origin largely because of great variations in climate.