1) During the Era of Good Feelings from 1821-1840, the political and social fabrics of American life underwent significant changes, though economically there was less change. 2) The emergence of the Whig party and the restoration of competitive two-party politics ended the Era of Good Feelings and increased tensions between states' rights supporters and nationalists. 3) Westward expansion increased pressures on Native Americans, leading to policies of forced relocation like the Trail of Tears, and heightened tensions over slavery as slave revolts became more common.