Which statement characterizes the Era of Good Feelings following the War of 1812?

The Era of Good Feelings, which followed the War of 1812, is characterized primarily by a surge in nationalism and patriotism within the United States. This period, roughly from 1815 to 1825, was marked by the sense of unity and national purpose that emerged after the war, as the United States successfully defended itself against British forces. The conflict fostered a spirit of national pride, leading to an increase in support for national infrastructure projects, expansion, and the promotion of American culture.

During this time, the Federalist Party, having opposed the war, declined significantly, resulting in a political atmosphere dominated by the Democratic-Republicans. This absence of fierce political rivalry contributed to a general perception of harmony and goodwill, even though tensions and divisions would soon begin to re-emerge in subsequent years over issues like slavery, tariffs, and state rights.

While the other options refer to potential influences and events, they do not characterize the essence of this particular period as accurately as the increased nationalism and patriotism do. Economic challenges and isolationist sentiments were not defining characteristics of the Era of Good Feelings, rather these were aspects that played out in different ways in American history.