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In page Charles A. Beard:

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Beard opposed Franklin Delano Roosevelt's foreign policy, consistent with his Quaker roots. He became one of the leading proponents of American non-interventionism seeking to avoid American involvement in Europe's wars. He promoted "American Continentalism" as an alternative, arguing that the United States had no vital interests at stake in Europe and that a foreign war could lead to domestic dictatorship. He opposed American participation in World War II.[1]