Today, no less than in the past, the tetrahedral form of the earth and the relation of the tetrahedron to the poles and to the equator preserve the conditions that favor rapid evolution.
Ellsworth Huntington
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.
ability man mind
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.
environment race
From first to last the civilization of America has been bound up with its physical environment.
environment
According to the now almost universally accepted theory, all the races of mankind had a common origin.
race
Surprising as it may seem, this study indicates that similar conditions are best for all sorts of races.
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.
evolution favors
The geysers and hot springs of the Yellowstone are another proof of recent volcanic activity.
proof
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