It was at the period of the congress of Aix-la-Chapelle and of Laybach, when the “Holy Alliance” was combined to arrest all political changes in Europe in the sense of liberty, when they were intervening in southern Europe for the reestablishment of absolutism, and when they were meditating interference to check the progress of free government in America, that Mr. Monroe, in his annual message of December, 1823, declared that the United States would consider any attempt to extend the European system to any portion of this hemisphere as dangerous to our peace and safety.  “With the existing colonies or dependencies of any European power,” he said, “we have not interfered and shall not interfere; but with the governments who have declared their independence and maintained it, and whose independence we have, on great consideration and on just principles, acknowledged, we could not view any interposition for the purpose of oppressing them, or controlling in any other manner their destiny, by any European power in any other light than as the manifestation of an unfriendly disposition toward the United States.”

This declaration resolved the solution of the immediate question of the independence of the Spanish American colonies, and is supposed to have exercised some influence upon the course of the British cabinet in regard to the absolutist schemes in Europe as well as in America.

It has also exercised a permanent influence on this continent.  It was at once invoked in consequence of the supposed peril of Cuba on the side of Europe; it was applied to a similar danger threatening Yucatan; it was embodied in the treaty of the United States and Great Britain as to Central America; it produced the successful opposition of the United States to the attempt of Great Britain to exercise dominion in Nicaragua under the cover of the Mosquito Indians; and it operated in like manner to prevent the establishment of a European dynasty in Mexico.

The United States stand solemnly committed by repeated declarations and repeated acts to this doctrine, and its application to the affairs of this continent.  In his message to the two Houses of Congress at the commencement of the present session the President, following the teachings of all our history, said that the existing “dependencies are no longer regarded as subject to transfer from one European power to another.  When the present relation of colonies ceases, they are to become independent powers, exercising the right of choice and of self-control in the determination of their future condition and relations with other powers.”

This policy is not a policy of aggression; but it opposes the creation of European dominion on American soil, or its transfer to other European powers, and it looks hopefully to the time when, by the voluntary departure of European Governments from this continent and the adjacent islands, America shall be wholly American.

It does not contemplate forcible intervention in any legitimate contest, but it protests against permitting such a contest to result in the increase of European power or influence; and it ever impels this Government, as in the late contest between the South American Republics and Spain, to interpose its good offices to secure an honorable peace.