The 14th Amendment

Did the 14th Amendment make the federal government the "primary authority over the states and the rights of individuals?”
How did the evolving judicial interpretation of the 14th Amendment change the relationship between state and federal governments? (Confine your answer to the years 1872 - 1954)
To what extent has the federal court system been successful in protecting against injustices committed at the state level? (Confine your answer to the years 1872 - 1954)