That is a foreign policy which determinedly aims towards the isolation of a country's national and international interests from world events. It is, to a large extent, an unrealistic foreign policy insofar as it ignores the extent to which national interests are ultimately intermingled with both international ones and those of other nations. World War I, according to this interpretation, exposed the extent to which the United States' foreign policy had oversimplified the extent to which national interests, largely economic ones, were predicated on the well-being and stability of other nations, specifically the European ones. Realization of the aforementioned, therefore, forced the United States, largely out of concern for its own national interests and welfare, to break with its non-interventionist foreign policy and embrace a more interventionist one in which the US engaged in the affairs of other nations for the promotion and protection of its own interests.
The United States refusal to sign the Versailles Treaty was consistent with its pre-World War I foreign policy. Quite simply stated, prior to World War I, the United States had pursued a non interventionist foreign policy and had, upon the outbreak and prolongation of the aforementioned event, only temporarily broken with that policy. ...
Accordingly, the very last thing that it wanted was another European war. The terms of the Versailles Treaty, however, appeared to threaten just that. Certainly, it should have included limitations on Germany's arming itself or having a standing army for some time, as was the case with World War II peace agreements, but it should not have included reparation terms as which effectively ensured the economic ruination of Germany. The United States refused, within the context of the stated, to ratify the treaty because it interpreted it as a recipe for continued conflict and not one for peace and the restoration of US-European economic relations and ties. The United States was opposed to the treaty because it hardly allowed for the stability requisite for reversion to a policy f non-intervention and, following involvement in the Great War, this is precisely what the United States and its citizens wanted. Accordingly, the United States' refusal to sign the Versailles Treaty did not mark a break with the its customary approach to dealing with other nations but a determination to perverse its pre-World War I strategy for international dealings and a refusal to get involved in a treaty which, from its perspective, was likely to ignite another conflict into which the United States could get dragged.
10.04 World War II
While the United States' entry into World War I was indicative of a remarkable break with prior foreign policy, its decision to engage in World War II, was not. Ever since its involvement in World War I, the United States was never really able to revert to its pre-World War I isolationist foreign policy and, indeed, was gradually being drawn into