USA HISTORY

Detailed explanation-1: -Isolationists believed that World War II was ultimately a dispute between foreign nations and that the United States had no good reason to get involved. The best policy, they claimed, was for the United States to build up its own defenses and avoid antagonizing either side.

Detailed explanation-2: -Following World War II, the United States began an economic boom that brought unparalleled prosperity to a majority of its citizens and raised Americans expectations, breeding a belief that most economic and social problems could be solved.

Detailed explanation-3: -On December 7, 1941, following the Japanese bombing of Pearl Harbor, the United States declared war on Japan. Three days later, after Germany and Italy declared war on it, the United States became fully engaged in the Second World War.

Detailed explanation-4: -The Marshall Plan, also known as the European Recovery Program, was a U.S. program providing aid to Western Europe following the devastation of World War II. It was enacted in 1948 and provided more than $15 billion to help finance rebuilding efforts on the continent.