Why did the united states adopt an interventionist role in global politics?

Because Reagan viewed the Soviet Union as an "evil empire" that was unstoppable in terms of spreading communism and related oppression if the United States did not act to stave off the spread of Communist rule worldwide.

Isolationism is a doctrine practiced by the United States during a large part of its history with the objective of not intervening in external affairs that did not pose a real threat to their country.

The beginning of the twentieth century brought with it problems that occurred in Europe and the Pacific, and this would end in large part with the isolationist feelings of the United States. The annexation of the Philippine Islands during the Hispano-American War of 1898 displaced US interests to the western Pacific Ocean, at the gates of Japan. USA UU he did not know how to perceive the threats against his position of neutrality. This caused the submarine war of Germany during the First World War, whose objective was to avoid the arrival of supplies towards the British Empire. When the war ended, EE. UU he forgot his new alliances; both the Treaty of Versailles and the League of Nations found little support from Congress.

The interwar period caused a resurgence of isolationism in the United States. After the war broke out in Europe, Americans like Charles Lindbergh, Gerald P. Nye and Rush D. Holt advocated American isolationism.

The effective attack of Japan on Pearl Harbor in 1941 broke any hope of EE. UU to maintain the isolationism, in fact this immediately made it to EE. UU In the Second World War. This time the alliances would not evaporate with the Allied victory: on the contrary, the Cold War would make them more desirable than ever. Today, EE. UU It is very far from isolationism. Thanks to the United Nations, today it maintains defensive agreements with forty-four sovereign states.

Currently, many people in the US UU calls for a return to an isolationist foreign policy.1 This includes progressives like Ralph Nader, conservatives like Pat Buchanan, and libertarians like Justin Raimondo.

the two colonies had the earliest laws mandating religious tolerance.