What were the effects of prosperity after World War II?

"The Cold War", had unfolded in the decade & a half, That is when the U.S went through the "Phenomenal Economic Growth". The war, which in return brought prosperity and also while in the "Postwar Period" the U.S has consolidated their title as the, "World's Richest State". But they did have different sources.

Explanation:

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)