How the Supreme Court cases of 1883 (Civil Rights Cases) and 1896 (Plessy v. Ferguson)

How did the Supreme Court cases of 1883 (Civil Rights Cases) and 1896 (Plessy v. Ferguson) allow for the rise of the Jim Crow South with its legal racial discrimination and segregation? Discuss John Marshall Harlan’s reasoning in his dissents for each case. (In other words, why did Harlan disagree with the majority? Why did he see both majority decisions as constitutionally wrong?)