isolationism

isolation +‎ -ism

• (US, Canada) IPA^(key): /ˌaɪsəˈleɪʃəˌnɪzəm/

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isolationism (countable and uncountable, plural isolationisms)

1. A national (or group) policy of non-interaction with other nations (or groups).
   • 2024 November 7, Shibani Mahtani, Miriam Berger, “World now looks at how Biden will reshape U.S. policies after turbulent Trump era”, in The Washington Post‎:

     Many hope the period of American isolationism and country-first populism under President Trump will give way to an era of renewed U.S. global leadership and embrace of multilateralism to tackle common challenges.

• isolationist