Final answer:
The three key elements of the Monroe Doctrine are non-interference, no colonization, and separation of politics.
Step-by-step explanation:
The three key elements of the Monroe Doctrine are:
- Non-interference: The doctrine stated that European nations should not interfere in the affairs of the newly independent countries in the Western Hemisphere.
- No colonization: It asserted that future European colonization in the Western Hemisphere would not be allowed.
- Separation of politics: It emphasized that the political systems of the Americas and Europe were different, and neither side should meddle in the affairs of the other.