How did plessy vs. Ferguson change segregation in the united states?

Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation.

Explanation:

As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brown vs Board

Explanation:

Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation. As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brownv.