Michelle Alexander, professor, civil rights advocate, legal scholar, and author of "The New Jim Crow: Mass Incarceration in the Age of Colorblindness"

"What is most fascinating about the marijuana legalization debate is how long it has taken us to get to this point. The potential harm associated with smoking marijuana pales in comparison with the harm suffered by the millions who have been arrested, jailed and branded criminals simply because they were caught with the drug."