Final answer:
The 'Era of Good Feelings' concluded with the contentious election of 1824, which heralded the end of one-party dominance and began an era of increased political division.
Step-by-step explanation:
The period called the "Era of Good Feelings" came to an end with the election of 1824. This marked the end of the era where one political party largely dominated the American political scene. The election of 1824 was contentious, with Andrew Jackson, John Quincy Adams, and other Democratic-Republican candidates vying for the presidency. Eventually, John Quincy Adams won through political negotiations in the House of Representatives, which Jackson's supporters called the "corrupt bargain." The fallout from this election signaled a return to a two-party system, the crystallization of political divisions, and the start of the Jacksonian era.