The passage is from the Neutrality Act of 1937.

Whenever the President shall find that there exists a state of war between, or among, two or more foreign states, . . . it shall thereafter be unlawful to export . . . arms, ammunition, or implements of war from any place in the United States to any belligerent state.

The act is an example of the United States’ belief in

intervention.
isolationism.
appeasement.
peace.

ANSWER IS ISOLATIONISM!