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10 National Doctrines That Changed The World

Darren January 30, 2026 4 min

1. The Monroe Doctrine

1. The Monroe Doctrine
President Monroe’s 1823 doctrine asserts U.S. influence in the Americas, shaping centuries of foreign policy.

In 1823, President James Monroe declared the Americas off-limits to European colonization, reshaping the Western Hemisphere’s political landscape. This doctrine justified later U.S. interventions in Latin America and influenced foreign policy for centuries. Its legacy remains debated, especially in Latin America. (history.state.gov)

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Darren

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