Final answer:
The Era of Good Feelings was characterized by patriotic sentiments and nationalistic fervor in the United States after the War of 1812. It was a time of one-party dominance and the implementation of major new economic policies to promote national economic development.
Step-by-step explanation:
The period from 1817 to 1825 is often called the Era of Good Feelings because of the patriotic sentiments and nationalistic fervor that emerged in the United States after the War of 1812. During this time, there was one-party dominance as the Federalist party declined, leading to a period of relative political unity. Additionally, major new economic policies were implemented, such as the chartering of the Second Bank of the United States and the approval of a protective tariff, which aimed to promote national economic development.