Eliga Gould has written an intriguing new history of the diplomatic engagement of the United States in the long period spanning the Seven Years’ War to the Monroe Doctrine. It is different from most such histories of foreign policy in registering the perspective of various excluded groups—French Acadians who were expelled from their homeland in 1761 by Great Britain; loyalists consigned to exile by the American Revolution; the Native American nations and British hangers-on who contested possession of the Ohio Valley and the southern borderlands from the Peace of 1763 to Jackson’s War on the Seminoles in 1818; pirates and…