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Although his music does have political undertones, and he’s a vocal fan of Hillary Clinton, Pusha T is also about partying and having fun. But that’s not why he’s advocating on behalf of California’s Proposition 64 law, which would legalize recreational marijuana use in the state for people 21 and up. (McDonald’s and thirstiness are also incidental to the cause.)

His argument, as he explains in a new PSA, is similar to that laid out in Ava DuVernay’s excellent Netflix documentary 13th: Legalizing marijuana would permanently end marijuana arrests in California, which would significantly reduce the number of people in jail on drug charges in the state and eliminate recidivism related to the drug. Thus, it would make a measurable impact on the problem of mass incarceration—which disproportionately affects black men, labeling them criminals and excluding them from the political system for life—in the state, and beyond. “I’m not a California voter, but I know when good legislation passes in the biggest state, other states follow,” he says.

You can watch the full PSA, courtesy of Rolling Stone, below.

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