Answer:
The American states will not be united.
Step-by-step explanation:
The Era of Good Feelings have been different if Americans had lost the War of 1812 because the American were never united and get economic prosperity. If the Americans had lost the war of 1812 from Britain then the American states were unable to united and get economic prosperity. The revolt was crushed by Britain empire and the southern states have to pay more taxes to British empire.