Last month, Mexico's Congress convened a special forum to consider marijuana policy reform as a remedy for that country's current crisis of violence. The forum bucked a century of staunch prohibitionist history in Mexico, a history that has contributed to the continued criminalization of marijuana use throughout North America.

From early on, marijuana was portrayed in Mexico as a frightening substance that produced madness in its users. In 1897, Revista Medica, one of Mexico's leading scientific journals, reported that marijuana produced "pleasant visions and hallucinations," an "expansion of the spirit that leads to exaltation" but also an "impulsive delirium" with often fatal consequences: "It is true that in other regions the delirium that is produced by marijuana is a turbulent one, but in our country it reaches the point of furor, terrible and blind impulse, and leads to murder."

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