Final answer:
President Reagan invoked the Monroe Doctrine to restore American stature, uphold authoritarian governments, and counter Soviet influence in the Western Hemisphere.
Step-by-step explanation:
President Reagan invoked the Monroe Doctrine for various reasons. President Reagan invoked the Monroe Doctrine to restore American stature, uphold authoritarian governments, and counter Soviet influence in the Western Hemisphere.
Firstly, he aimed to restore American stature in the world and uphold authoritarian governments in foreign countries to protect them from Soviet influence. Additionally, Reagan sought to put an end to the Vietnam Syndrome, which had influenced US foreign policy since the 1970s. By invoking the Monroe Doctrine, he aimed to counter Soviet influence and assert US dominance in the Western Hemisphere.