header by Emerson Taymor, 2005
1. The Colonial Era: 1607-1763
2. The Revolutionary Era: 1763-1789
3. The Early National Period: 1789-1824
4. Jacksonian America: 1824-1848
5. Antebellum America: 1848-1860
6. The Civil War Era: 1861-1877
9. The Twenties
10. Depression and New Deal: 1929-1939
14. The Sixties
Theodore Roosevelt, The Roosevelt Corollary to the Monroe Doctrine (1904)
It is not true that the United States feels any land hunger... as regards the other nations of the Western Hemisphere save such as are for their welfare. All that this country desires is to see the neighboring countries stable, orderly, and prosperous. Any country whose people conduct themselves well can count upon our hearty friendship. If a nation shows that it knows how to act with reasonable efficiency and decency in social and political matters, if it keeps order and pays its obligations, it need fear no interference from the United States. Chronic wrongdoing, or an impotence which results in a general loosening of the ties of civilized society [however], may in America, as elsewhere, ultimately require intervention by some civilized nation, and in the Western Hemisphere the adherence of the United States to the Monroe Doctrine may force the United States, however reluctantly, in flagrant cases of such wrongdoing or impotence, to the exercise of an international police power.... While [our Southern neighbors] obey the primary laws of civilized society they may rest assured that they will be treated by us in a spirit of cordial and helpful sympathy.... It is a mere truism to say that every nation, whether in America or anywhere else, which desires to maintain its freedom, its independence, must ultimately realize that the right of such independence can not be separated from the responsibility of making good use of it.
ee also the official State Department description of the Roosevelt Corollary.