What happened because the supreme courts landmark decision in brown vs. broad of education

In this milestone decision, the Supreme Court ruled that separating children in public schools on the basis of race was unconstitutional. It signaled the end of legalized racial segregation in the schools of the United States, overruling the "separate but equal" principle set forth in the 1896 Brown v. Board of Education

Explanation:

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.