1. The Monroe Doctrine
Source Analysis

2. The citizens of the United States cherish sentiments the most friendly, in favor of the liberty and happiness of their fellow men on that side of the Atlantic. In the wars of the European powers, in matters relating to themselves, we have never taken any part [sides], nor does it comport [agree] with our policy to do so. It is only when our rights are invaded, or seriously menaced [endangered], that we resent injuries, or make preparation for our defence.
-- from President James Monroe's seventh annual message to Congress, December 2, 1823 #1

3. #2

4. #3

5. #4

6. #5
Monroe Doctrine
The Americas were no longer available for colonization by any power
The political system of the Americas was essentially different from that of Europe
The U.S. would consider any interference by European powers in the Americas a direct threat to U.S. Security
The U.S. would not interfere with existing colonies or with the internal affairs of European nations, nor would the U.S. participate in European wars.