Michelle Alexander thinks not that far (not as far as most people think). Her book The New Jim Crow: Mass Incarceration in the Age of Colorblindness, offers a sweeping critique of the criminal justice system as a new form of institutional racism. The core argument is two findings: (1) white people do drugs as much as black people, but (2) black people are virtually the only people getting busted for it. Although she certainly thinks we have gone far in some respects, this book cannot be silenced.
Youtube "michelle alexander the new jim crow" to see a good Q and A about the book.
the new jim crow