Isolationism, a persistent refrain in the history of American foreign policy, has received its full share of recent investigation. These investigations have followed a number of approaches, varying from historical research into the interaction of isolationist and interventionist groups and individuals in the pre-World War II period to studies of the underlying causes of isolationist thinking. It is the purpose of this paper to consider one of the ambiguities that still remain; that is, the commonly accepted assumption that in recent decades the Midwest has been the hard core of isolationism.

Midwestern isolationism is actually only one part of the larger question concerning the existence of a regional or geographic isolationist sentiment. On the untested assumption that isolationism is regional has rested the geographic explanation that isolationism is strongest in interior states because of the sense of insulation from international affairs that such location fosters. In this paper certain non-regional factors will be examined for their possible relationship to geographical centers of isolationist strength. Non-regional, socio-political factors might actually form the basis for several separate studies, and their consideration here is only intended to be suggestive of the further limitations these factors impose on a simple geographic explanation of isolationism.