Isolationism is a foreign policy which combines a non-interventionist military policy and a political policy of economic nationalism (protectionism). In other words, it asserts both of the following: Non-interventionism – Political rulers should avoid entangling alliances with other nations and avoid all wars not related to direct territorial self-defense.Protectionism – There should be legal barriers to control trade and cultural exchange with people in other states. Introduction "… (More on Isolationism)