What was the major impact of plessy v. ferguson upon american society? this case made no impact upon american society. it made segregation illegal and said that "separate was not equal." it upheld segregation laws and made segregation the law of the land. it made the thirteenth and fourteenth amendments invalid in the constitution.

Plessy v. Ferguson upheld segregation laws and made segregation the law of the land. Until this court case, states had laws about segregation, such as separate train cars for black and white, but were not enforceable across state lines. This court case now said that segregation, as long as it was equal, was constitutionally valid, and it became the law of the land until 1954.

C. It upheld segregation laws and made segregation the law of the land.

i belive the classic sword and a shield would do