Nonintervention or non-interventionism is a foreign policy which holds that political rulers should avoid alliances with other nations, but still retain diplomacy, and avoid all wars not related to direct self-defense.
King Ahaz of Judah (the Southern Kingdom) fears an attack by Israel (the Northern Kingdom) and Syria. Against Isaiah’s advice and despite Isaiah’s assurance that Israel and Syria will not pose a threat, Ahaz seeks help from Assyria rather than relying on God.
Traditionally, Switzerland avoids alliances that might entail military, political, or direct economic action and had been neutral since the end of its expansion in 1515. Its policy of neutrality was internationally recognised at the Congress of Vienna in 1815.
US Non-interventionism shortly before WWII
Between 1936 and 1937, much to the dismay of the pro-Britain President Roosevelt, Congress passed the Neutrality Acts. These Acts did everything they could to delay U.S. entry into a European war.