Britain was against the American Independence because America would be the first colony to gain independence from its western colonist and it would create a revolution and rebellion in other parts where britain had colonised.
Explanation:
The news that America was finally going to be independent from the Britain, it shocked everyone. They were not expecting that Britain would let loose on the Americans.
The economic advantages were highly effected, America was a great hub of resources. Britain's were afraid that seeing how Americans have gained freedom, other countries might get the same idea and rebel.
The Monroe Doctrine was a United States policy of opposing European colonialism in the Americas beginning in 1823. ... By the end of the 19th century, Monroe's declaration was seen as a defining moment in the foreign policy of the United States and one of its longest-standing tenets.