Briefly describe what the post war United States was like

As the Cold War unfolded in the decade and a half after World War II, the United States experienced phenomenal economic growth. The war brought the return of prosperity, and in the postwar period the United States consolidated its position as the world's richest country. Following World War II, the United States emerged as one of the two dominant superpowers, turning away from its traditional isolationism and toward increased international involvement. The United States became a global influence in economic, political, military, cultural, and technological affairs.

Explanation:

i think it was   tsar alexander ii