Abstract
This chapter examines the impact of regionalism on U.S. foreign policy. In contrast to accounts that grant primacy to ideas or institutions, it argues that America’s regional diversity is the most important source of tension and conflict over foreign policy. It also shows that conflicts over the purposes of American power, as well as the constitutional authority to exercise it, are fundamentally conflicts over the distribution of wealth and power in American society among coalitions with divergent interests and claims on the federal government’s resources. The chapter develops this argument by analysing debates over American foreign policy in three different periods: the 1890s, the 1930s, and the current era. After discussing the link between regional interests and foreign policy, the chapter considers the great debate over expansionism, the struggle over internationalism, and American primacy and the ‘new sectionalism’.