" French-Canadian, the Alaskan, the Latin-American, the German, the Italian, the Anglo-American, and the American Indian, squaw and warrior. In the place of honor in the center of the group, standing between the oxen on the tongue of the prairie schooner, is a figure, beautiful and almost girlish, but strong, dignified, and womanly, the Mother of To-morrow. Above the group rides the Spirit of Enterprise, flanked right and left by the Hopes of the Future in the person of two boys. The group as a whole is beautifully symbolic of the westward march of American civilization. "

― Charles A. Beard , History of the United States