Final answer:
Isolationism is a foreign policy advocating non-involvement in world affairs to safeguard national interests.
Explanation:
Isolationism is a foreign policy approach advocating a nation's staying out of foreign entanglements and keeping to itself to serve its national interests. This policy is a belief that a country benefits from avoiding involvement with foreign nations to maintain its sovereignty and independence.
Neo-isolationism, a modern version of isolationism, involves distancing a country from international organizations like the United Nations while still participating in the global economy. Selective engagement, on the other hand, involves maintaining a strong military presence and strategic alliances to safeguard national security interests.
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