In 1823, which policy was adopted as the cornerstone of American foreign policy for the next century?

In 1823, which policy was adopted as the cornerstone of American foreign policy for the next century?

• A. Open Door Policy
• B. Truman Doctrine
• C. Roosevelt Corollary
• D. Monroe Doctrine

Answer: (D)

The central idea being tested is how a single policy defined the United States’ approach to Europe and the Western Hemisphere for a long period. The Monroe Doctrine, proclaimed in 1823, asserted that the Western Hemisphere was closed to new European colonization and warned European powers not to interfere in the affairs of nations in the Americas. In return, the United States pledged to stay out of European wars and politics, at least in principle. This combination created a hemispheric safeguard and a clear U.S. leadership role in the region, shaping American diplomacy for roughly a century. The other policies came later and address different situations: the Open Door Policy deals with China in the late 19th century; the Truman Doctrine focuses on containing communism after World War II; the Roosevelt Corollary is an expansion of the Monroe Doctrine that justifies intervention in Latin America. But in 1823, the Monroe Doctrine is the foundational statement that set the long-run approach to hemispheric affairs.

The central idea being tested is how a single policy defined the United States’ approach to Europe and the Western Hemisphere for a long period. The Monroe Doctrine, proclaimed in 1823, asserted that the Western Hemisphere was closed to new European colonization and warned European powers not to interfere in the affairs of nations in the Americas. In return, the United States pledged to stay out of European wars and politics, at least in principle. This combination created a hemispheric safeguard and a clear U.S. leadership role in the region, shaping American diplomacy for roughly a century.

The other policies came later and address different situations: the Open Door Policy deals with China in the late 19th century; the Truman Doctrine focuses on containing communism after World War II; the Roosevelt Corollary is an expansion of the Monroe Doctrine that justifies intervention in Latin America. But in 1823, the Monroe Doctrine is the foundational statement that set the long-run approach to hemispheric affairs.