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.

In fact, the history of North America has been perhaps more profoundly influenced by man's inheritance from his past homes than by the physical features of his present home.

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.

Fertile soil, level plains, easy passage across the mountains, coal, iron, and other metals imbedded in the rocks, and a stimulating climate, all shower their blessings upon man.