Which foreign policy principle was emphasized by the Monroe Doctrine?

The Monroe Doctrine is primarily remembered for its strong stance against European colonialism in Latin America. Introduced by President James Monroe in 1823, the doctrine asserted that any further attempts by European nations to colonize or interfere in the affairs of the countries within the Americas would not be tolerated. This marked a significant moment in U.S. foreign policy, as it established a clear warning to European powers against expanding their influence in the Western Hemisphere.

By opposing European colonialism, the Monroe Doctrine aimed to protect the newly independent nations of Latin America and solidify the United States' role as a defender of these nations. It emphasized the idea that the Americas were no longer open to European colonization, which helped to foster a sense of regional identity and autonomy among Latin American countries, while simultaneously positioning the United States as a dominant power in the region.

The other options do not align with the core principles of the Monroe Doctrine. For instance, military alliances with European countries were not a focus of this doctrine; rather, it sought to create a distinction between the Americas and European affairs. Similarly, while isolationism in foreign affairs might describe U.S. policy in certain periods, the Monroe Doctrine specifically called for active opposition to foreign intervention rather than a withdrawal from international influence