Post-Revolutionary America: 1800–1840 – The Metropolitan Museum of Art https://www.metmuseum.org/essays/post-revolutionary-america-1800-1840
… although Americans had begun to identify themselves as a nation, they were divided by sectional interests that deepened with rapid industrialization and the question of slavery.
By 1820, 2 million Americans lived west of the Appalachians, out of a total national
