What shows the broad geographic impact of an event

The segregation of wealthy suburban neighborhoods outside of metropolitan areas.

Explanation:

After their liberation during the civil war by Abraham Lincoln, the southern states, resentful of their defeat during the civil war, sanctioned a variety of laws to discriminate against black citizens. This phenomenon occurred during the period of post-civil war "reconstruction." With the election of Rutherford B. Hayes as the nineteenth president, discrimination spread to the northern states that initially had it more smoothly, to such a degree. At the beginning of the 20th century, the severity of discrimination and racism could be seen in places like New York, Boston, Detroit, Chicago and Los Angeles According to a study between 1830 and 1950, 4,000 blacks were lynched in the United States. the source was often a public and popular spectacle with sometimes thousands of witnesses, where 25% of the accusations were abuse against whites, where neither recognition of the victim was demanded of the aggressor and that caused the emigration or the ethnic purity of 6,000 Thousands of blacks in the north and west of the country, because the states could not eliminate the rights of the blacks, which are guaranteed in the constitution, the "segregated" "which was legal for many years under the idea of" Separated but Equal ". The idea was that while the opportunities that were granted were equal for both races, this was legal.