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the policy or doctrine of isolating one's country from the affairs of other nations by declining to enter into alliances, foreign economic commitments, international agreements, etc., seeking to devote the entire efforts of one's country to its own advancement and remain at peace by avoiding foreign entanglements and responsibilities. The term is most often applied to the political atmosphere in the U.S. in the 1930s.Isolationism has been a recurrent theme in U.S. history.

switch around #3 and #4

explanation:

i hope this , im not 100% on this i really hoped this

the answer would be a i think?