But certain large consequences of the war seem clear. Secession and slavery were killed, never to be revived during the century and a quarter since Appomattox. These results signified a broader transformation of American society and polity punctuated if not alone achieved by the war. Before 1861 the two words “United States” were generally rendered as a plural noun: “the United States are a republic.” The war marked a transition of the United States to a singular noun. The “Union” also became the nation, and Americans now rarely speak of their Union except in an historical sense. Lincoln’s
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