The excerpt you gave talks about the historical background of racial injustice and segregation in the United States, specifically the creation of Jim Crow laws and the judicial challenges against them. The Supreme Court decision Plessy v. Ferguson, which had a substantial influence on the legality of racial segregation, is also mentioned in this passage.
The word Jim Crow laws is a derogatory nickname for an African-American that refers to the state and local laws that were implemented in the Southern United States in the late 19th and early 20th century to impose racial segregation.
These laws were in effect up to the 1960s.Even though a number of states beyond the South had outlawed discrimination in public facilities and voting, official and substantial influence informal segregation practices still existed in other regions of the United States.
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