The document discusses the period after the War of 1812, labeled the "Era of Good Feelings," examining the rise of nationalism and sectionalism. While there was a spirit of nationalism under President Monroe, sectional divisions emerged over the expansion of slavery and internal improvements, bringing the era to an end with the controversial election of 1824. Economic issues like the Panic of 1819 and the Missouri Compromise of 1820 further highlighted regional differences between the North, South, and West.