Answer:
The sentence in Brown v. Board of Education in 1954 declared the separation of black and white schoolchildren as unconstitutional. The plaintiffs in Brown v. Board of Education argued that racial segregation, under the guise of separation and equality, actually perpetuates the practice of providing black citizens with poorer quality and protection. This was shared by the Supreme Court, which declared the "separated but equal" principle unconstitutional.
However, this did not end racial segregation, as it was a statement at the federal level, which was not immediately admitted by the southern states of the country. Thus, segregation continued to exist until it gradually began to disappear, mainly after the Civil Rights Act of 1964.