According to Warren in the Brown opinion, how did conditions change between the time the Fourteenth Amendment was adopted and the time the Supreme Court considered Brown v. Board of Education?

that racial segregation in public schools violated the Fourteenth Amendment to the Constitution, which prohibits the states from denying equal protection of the laws to any person within their jurisdictions.

Explanation:

Board of Education of Topeka case in May 17th 1994 the US Supreme Court ruled in 9-0 because the racial segregation in public schools was violated the Fourteenth Amendment to the Constitution which prohibits the States from denying equal protection of laws to any person within their jurisdiction

according to this text from the preamble to the declaration, who gives men their unalienable rights?