How did the united states change after the brown v. the board of education ruling?

There are about three big ones that come off the top of my head.

It overruled the Plessy v. Ferguson case, which made Jim Crow and Segregation legal with its famous “separate but equal” ruling. It emboldened the Civil Rights movement, as this major victory gave organizations like the NAACP and CORE a legal platform to combat racism. It redefined the values of America, replacing Segregation with Integration.

It allowed African American student to get a better right to education

The statistics for the eastern war are grim. more than three-million men died in the fighting, more than nine-million men were wounded, and every major country which participated lost its form of government.