What event caused the United States to emerge as a world superpower?

Question

Quizplus · Accepted Answer

World War II had a significant impact on the world and the United States emerged as a world superpower after the war. The U.S. economy, having been largely untouched by the destruction of the war, grew rapidly and the country became the dominant economic and military power in the world. The U.S. also played a major role in the formation of the United Nations, which helped to establish the U.S. as a global leader.

What Event Caused the United States to Emerge as a World