History in its broadest aspect is a record of man's migrations from one environment to another.

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.

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.

History in its broadest aspect is a record of man's migrations from one environment to another.

Year by year we are learning that in this restless, strenuous American life of ours vacations are essential.

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.

From first to last the civilization of America has been bound up with its physical environment.