Which of the following is the best example of isolationism in international politics?

Foreign policy of the US from the American War of Independence in 1787 up to the beginning of the First World War.

The policy of staying away from alliances should not be considered isolationism or neutrality. Non-alignment is not isolationism since isolationism means remaining aloof from world affairs. Isolationism sums up the foreign policy of the US from the American War of Independence in 1787 up to the beginning of the First World War. In comparison, the non-aligned countries, including India, played an active role in mediating between the two rival alliances in the cause of peace and stability. Their strength was based on their unity and their resolve to remain non-aligned despite the attempt by the two superpowers to bring them into their alliances.