e end of the 19th century this nation extended southward to the Gulf of Mexico, northward to the 49th parallel, and westward to the Pacific. By the end of the 19th century, too, it had taken its place among the powers of the world—its fortunes so interrelated with those of other nations that inevitably it became involved in two world wars and, following these conflicts, with the problems of Europe and East Asia. Meanwhile, the rise of science and industry, as well as changes in ways of thinking and feeling, wrought many modifications in people’s lives. All these factors in the development of the United States molded the literature of the country