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irreversible; but in human society differentiations are no longer confined to the bodies of individuals but have become, as it were, extra-corporeal.

By this control over nature man has taken into his evolution the whole of his environment. Although he is not as strong as the elephant nor as deft as the spider nor as swift as the antelope nor as powerful in the water as the whale or in the air as the eagle, yet by his control of the forces of nature outside of his body he can excel all animals in strength and delicacy of movement, in speed and power on land, in water, and in air.

This new path of progress is in all respects the most important which has ever been discovered by organisms, and no one can foresee the end of this process of annexing to our own powers the illimitable forces of the universe.

-78-

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Publication Information: Book Title: The Direction of Human Evolution. Contributors: Edwin Grant Conklin - author. Publisher: C. Scribner's Sons. Place of Publication: New York. Publication Year: 1921. Page Number: 78.
    
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