Monroe Doctrine, (December 2, 1823), cornerstone of U.S. foreign policy enunciated by Pres. James Monroe in his annual message to Congress.
Declaring that the Old World and New World had different systems and must remain distinct spheres.
Monroe made four basic points:
(1) the United States would not interfere in the internal affairs of or the wars between European powers;
(2) the United States recognized and would not interfere with existing colonies and dependencies in the Western Hemisphere;
(3) the Western Hemisphere was closed to future colonization; and
(4) any attempt by a European power to oppress or control any nation in the Western Hemisphere would be viewed as a hostile act against the United States.
The doctrine was an outgrowth of concern in both Britain and the United States that the continental powers would attempt to restore Spain’s former colonies, in Latin America, many of which had become newly independent nations.
The United States was also concerned about Russia’s territorial ambitions in the northwest coast of North America.
As a consequence, George Canning, the British foreign minister, suggested a joint U.S.-British declaration forbidding future colonization in Latin America.
Monroe was initially favorable to the idea, and former presidents Thomas Jefferson and James Madison concurred. But Secretary of State John Quincy Adams argued that the United States should issue a statement of American policy exclusively, and his view ultimately prevailed.
The first draft of the message included a reproof of the French for their invasion of Spain, an acknowledgement of Greek independence in the revolt against Turkey, and some further indications of American concern in European affairs. Adams argued for the better part of two days against such expressions, which were finally eliminated from the message.
According to which,
"The ground that I wish to take is that of earnest remonstrance against the interference of the European powers by force in South America, but to disclaim all interference on our part with Europe; to make an American cause, and adhere inflexibly to that."
The Monroe Doctrine, in asserting unilateral U.S. protection over the entire Western Hemisphere, was a foreign policy that could not have been sustained militarily in 1823.
Monroe and Adams were well aware of the need for the British fleet to deter potential aggressors in Latin America. Because the United States was not a major power at the time and because the continental powers apparently had no serious intentions of recolonizing Latin America, Monroe’s policy statement (it was not known as the “Monroe Doctrine” for nearly 30 years) was largely ignored outside the United States.