Mark Kleiman is a professor of public policy at UCLA and the author of the book, When Brute Force Fails. He is one of America's leading experts on the regulation of cannabis and other controlled substances, and an advocate of criminal-justice reforms aimed at reducing incarceration levels and violent crime. This week on the VICE Podcast, Kleiman takes us through the challenges facing the cannabis-legalization movement, strategies for limiting the harms associated with alcohol abuse, and the impact of the decades-long US prison boom.

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