How did the supreme court decision in brown v. board of education relate to its earlier decision in pleggy vs ferguson

in plessy v. ferguson in 1896, the u.s. supreme court ruled that racially separate facilities, if equal, did not violate the constitution. segregation, the court said, wasn't discrimination.

in brown v. board of education, the court overturned plessy v. ferguson, and declared that racial segregation in public schools violated the equal protection clause of the 14th amendment.

what events in mexico's history might explain why the country continues to have difficulty improving social justice and economic opportunities for all people?

heat from the core of the earth causes convection currents to occur in the mantle. these currents slowly move the crust around.