We trace the Monroe Doctrine from a daring 1823 warning to a living rulebook that still shapes how America defines security, principle, and power. From John Quincy Adams to modern strategy, we test where defense ends and intervention begins.

• origins of the Monroe Doctrine and its core warning
• British alignment and Adams’s diplomatic gamble
• post‑1812 great power context and American confidence
• expansionist logic framed as defensive security
• the Roosevelt corollary and intervention as police power
• extension to Europe, NATO, and global alliances
• modern restatement in national security strategy
• Venezuela, Greenland, and hemispheric control debates
• Washington’s standard: interest balanced with justice
• civic responsibility to evaluate leaders and policy

Check Out the Civic Literacy Curriculum!

School of Civic and Economic Thought and Leadership

Center for American Civics