Roosevelt saw it as the duty of more developed ("civilized") nations to help the underdeveloped ("uncivilized") world move forward. In [[Cuba]], the [[Philippines]], [[Puerto Rico]], and the [[Panama Canal Zone]], he used the Army's medical service, to eliminate the [[yellow fever]] menace and install a new regime of public health. He used the army to build up the infrastructure of the new possessions, building railways, telegraph and telephone lines, and upgrading roads and port facilities. | Roosevelt saw it as the duty of more developed ("civilized") nations to help the underdeveloped ("uncivilized") world move forward. In [[Cuba]], the [[Philippines]], [[Puerto Rico]], and the [[Panama Canal Zone]], he used the Army's medical service, to eliminate the [[yellow fever]] menace and install a new regime of public health. He used the army to build up the infrastructure of the new possessions, building railways, telegraph and telephone lines, and upgrading roads and port facilities. |