On January 20, 1961, the handsome and charismatic John F. Kennedy became president of the United States. His confidence that, as one historian put it, “the government possessed big answers to big problems” seemed to set the tone for the rest of the decade. However, that golden age never materialized. On the contrary, by the end of the 1960s it seemed that the nation was falling apart.
I would say the Jim Crow laws
2nd option: Changing Stalin's policies.
The term "de-Stalinization" refers to the political reforms enacted by Nikita Khrushchev.
The reforms eradicated Stalin's influence on the Soviet Union. Khrushchev condemned his predecssor's (Stalin's) actions, and his image as this infalliable leader. Khrushchev promised to revert the Soviet Union back to its self-proclaimed socialist society.
The United States suppressed an uprising that sought to oust the military dictator of the Dominican Republic.