What: an expression of the post-1812 nationalism energizing the U.S. Proved to be the most famous of the long-lived offspring of that nationalism. Might have been called the Self-Defense Doctrine. Where & When: Incorporated into President Monroe's annual message to Congress in 1823. Its two basic features were:(1) Non-Colonization (2) Non-Intervention. Colonization's era had ended and England and other foreign powers needed to keep their monarchial systems out of the U.S. Old World powers could not gain anymore settlements. The U.S.