The Civil Rights Movement abolished the racist Jim Crow laws but racist oppression was not abolished; it merely took another form: "From the back of the bus to the front of the prison" or "The new Jim Crow." As the figure below (giving prison incarceration per 100,000 population, for blacks and whites and the ratio, from this source) illustrates, Jim Crow was simply replaced with racist prison incarceration, accomplished in large part by the War on Drugs:
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In 1975, shortly after Jim Crow became history, the rate of black imprisonment sky rocketed, having been essentially constant for the previous five decades, while the rate of white imprisonment after 1975 rose only very slightly. The oppression of working class blacks after the success of the Civil Rights Movement took a new form, and is arguably worse now than during the years of Jim Crow.