Progress and intelligence of Americans : whether in the northern, central, or southern portion of the continent, founded upon the normal and absolute servitude of inferior animates to mankind, as indicated by the order of nature and by the acts of creation, as laid down in the Bible: progress of that servitude south and southwest, as new territory may be acquired, either by purchase, or the national immergence of Mexico and Central America into the United States, through the vindication of the Monroe doctrine in becoming their protectorate. Advantages enumerated and explained /