Willis Fletcher Johnson's "America's Foreign Relations", 2 vols. (1915) is a history of the relations of the United States to the rest of the world. A shorter account is given in C. R. Fish's "American Diplomacy" (1915).
But much of the best material for the historical study of the first decade and a half of the twentieth century is to be found in the pages of the magazines and periodicals published during those years. "The Outlook", "The Independent", "The Literary Digest", "Collier's", "The Review of Reviews", "The World's Work", "Current Opinion", "The Nation", "The Commoner", La Follette's "Weekly"—all these are sources of great value. The Outlook is of especial usefulness because of Mr. Roosevelt's connection with it as Contributing Editor during the years between 1909 and 1914.