It became possible to challenge Jim Crow laws more successfully after 1955 following the outcome of the Brown Vs. The Board of Education's decision declared racial segregation as a violation of the 14th Amendment.
What were Jim Crow laws?
Jim Crow laws were state laws that entrenched racial segregation after the Plessy Vs. Fergusson's Supreme Court ruling upheld the constitutionality of racial segregation under the “separate but equal” doctrine.
The Jim Crow laws treated non-Whites as second-class citizens of America. They were enacted after Reconstruction.
Thus, challenging Jim Crow laws became more successful after 1955 because the Supreme Court declared that racial segregation violated the 14th Amendment.
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