What is the connection between plessy vs. fergunson and the encatment of Jim crow laws?

Plessy v. Ferguson (1896) established the legal doctrine of "separate but equal," which upheld racial segregation laws. This ruling provided a constitutional justification for the enactment of Jim Crow laws across the Southern United States, institutionalizing racial discrimination and segregation in public facilities, education, and transportation. As a result, the decision reinforced systemic racism and inequality, contributing to the disenfranchisement of African Americans for decades.