The martial spirit, by W. Millis.--The ideology of American expansion, by J. W. Pratt.--Businessmen and the open door, by C. S. Campbell, Jr.--The local stimulus-Hawaii, by W. A. Russ, Jr.--The missionary motive, by P. A. Varg.--The naval lobby, by R. Seager II.--Theodore Roosevelt, by D. H. Burton.--Brooks Adams, by C. Hirschfeld.--The changing concept of the open door, 1899-1910, by R. A. Esthus.--William Howard Taft and Cuba, 1906, by R. E. Minger.--Inevitable destiny, by A. K. Weinberg.--Imperialism and the liberal tradition, by L. Hartz.--Imperialists and anti-imperialists, by J. W. Rollins and T. J. McCormick.--The psychic crisis, by R. Hofstadter.--Looking backward, by L. J. Halle.