Final answer:
James Monroe is the President most known for the 'Era of Good Feeling', a period of national unity and harmony. It occurred from 1817 to 1825.
Step-by-step explanation:
The President most known for the 'Era of Good Feeling' is James Monroe. This period occurred from 1817 to 1825 and was characterized by a sense of national unity and political harmony after the War of 1812. During Monroe's presidency, there was a lack of major political disputes, and he promoted economic development and westward expansion.
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