A political stance of avoiding involvement in international affairs. Used in historical and modern contexts.
That country has long pursued isolationism.
Isolationism can sometimes hinder international cooperation.
排他主義 is about actively excluding others, while 孤立主義 refers more specifically to a policy of isolation, especially in politics.
Compound of 孤立 (isolation) and 主義 (principle, doctrine). A straightforward modern term for isolationism.