The term 'ERA of Good Feeling' refers to a PERIOD in American history from 1815 to 1825. This ERA was characterized by a sense of national unity and pride, as well as economic prosperity. The term is derived from the Latin word 'aera, ' which means 'AGE' or 'PERIOD.' During this time, the United States experienced a PERIOD of peace and stability following the War of 1812, and the nation's economy flourished. This PERIOD of good feeling was also marked by a spirit of optimism and a sense of national identity.