Why was the U. S. stronger than the USSR after world war 2?

Although World War II brought the two countries into alliance, based on the common aim ... After Soviet officials agreed, hundreds of American volunteers were ... rather than the USSR itself—along with competition for influence in the Third World, ... coexist without war because the Communist system had become stronger.

Explanation:

b.   jim crow laws were enacted in northern states.

answer:

it caused mass african migration, african populations to grow, african empires to topple, and racism against slaves to emerge.