Question

definition
sentence
isolationism
examples (synonyms)
nonexamples (opposites)

Explanation:

The term "Isolationism" relates to political and historical studies, which fall under the subfield of History (within Social Science). It involves analyzing a nation's policy of staying out of foreign affairs, so History is the most relevant subfield to explore its definition, examples, and non - examples.

Answer:

Social Science - History