Final answer:
The primary motive behind the Monroe Doctrine was to prevent further European colonization in the Western Hemisphere and establish the United States as a dominant power in the region. It aimed to protect the newly independent Latin American countries and maintain stability in the Americas.
Step-by-step explanation:
The primary motive behind the Monroe Doctrine was to prevent further European colonization in the Western Hemisphere and to establish the United States as a dominant power in the region. The doctrine aimed to protect the newly independent Latin American countries from European intervention and maintain stability in the Americas. Additionally, the Monroe Doctrine gave the United States the authority to intervene in the affairs of other nations in the Western Hemisphere if their actions posed a threat to American interests.