The correct answer is: Cold War-era competition between the
United States and the Soviet Union
The launch of Sputnik which was the first artificial Earth satellite
launched by Moscow in 1957 sparked U.S. fears of Soviet dominance in technology
and outer space. This resulted in the creation of NASA and the space race.
The underground railroad physically resisted the repressive laws that held slaves in bondage, by provoking fear and in anger in the south, and prompting the enactment of harsh legislation that eroded the rights of white Americans, the Underground Railroad was a direct contributing cause of the Civil War.
