Mexico, Jamaica & the Northward Migration of Cannabis

The standard American prohibition narrative begins with Harry Anslinger in the 1930s. But the racial-panic discourse about cannabis — the association of the plant with violence, insanity, and racial menace — originated not in Washington but in Mexico, and it crossed the border years before Anslinger took office. Meanwhile, in Jamaica, cannabis arrived through an entirely different channel: Indian indentured laborers who brought the Hindi word gāñjā and the practice of smoking to the Caribbean. These two streams — Mexican prohibition and Jamaican ganja culture — converge in the early twentieth-century United States, where labor migration carried the plant and its reputation into the American Southwest.

Mexico: Spanish hemp to moral panic

Cannabis arrived in the Americas as Spanish imperial hemp, brought to Mexico in the sixteenth century as cordage fiber for the colonial fleet. This was industrial cultivation — the same strategic resource that England mandated in its colonies. Over centuries, the plant seeped from the colonial economy into indigenous pharmacopoeia, folk medicine, and eventually the barracks, prisons, and lower-class milieus of Mexican society, acquiring the name mariguana or marihuana.

The conventional American telling treats Mexico as a passive source — the place cannabis came from on its way to becoming an American problem. Isaac Campos's Home Grown: Marijuana and the Origins of Mexico's War on Drugs (University of North Carolina Press, 2012) reshapes that narrative decisively.

Campos documents that by the late nineteenth century, Mexican newspapers — across the political spectrum — uniformly portrayed marijuana as causing violent insanity. The Mexican press described users as suffering "sudden paroxysms of delirious violence." This was not imported American propaganda; it was a domestic Mexican discourse, rooted in Mexican anxieties about lower-class drug use, military discipline, and social order.

Mexico bans cannabis: 1920

Mexico prohibited cannabis nationally in March 1920 — seventeen years before the United States passed the Marihuana Tax Act. This chronology matters. The Mexican ban was not a response to American pressure; it preceded American federal action by nearly two decades. A significant portion of the prohibitionist rhetoric that Americans associate with the 1930s had been circulating in Mexican public discourse since the 1890s.

The direction of influence, in other words, ran south to north. When American newspapers in the 1910s and 1920s began describing "marihuana" as a Mexican drug that caused violence and madness, they were recycling Mexican moral panic, not inventing it. Anslinger amplified the message, racialized it further, and weaponized it for bureaucratic purposes — but he did not create it from nothing.

Jamaica: cannabis arrives with Indian indenture

Jamaica's cannabis history begins on a specific date: May 10, 1845, when the SS Blundell Hunter docked at Old Harbour Bay carrying the first Indian indentured laborers. Between 1845 and 1917, roughly 36,400 Indians arrived in Jamaica under indenture contracts, recruited to replace the emancipated enslaved workforce on the island's sugar plantations.

They brought cannabis with them. The Hindi word gāñjā entered Jamaican English as ganja, and the practice of smoking cannabis flowers — distinct from the hashish preparations of the Middle East and the resin smoking of North Africa — became embedded in Jamaican working-class culture.

The colonial authorities responded with predictable anxiety. Jamaica enacted its Ganja Law in 1913, the first major Caribbean cannabis prohibition — driven by the same class-based fears that animated drug legislation elsewhere: the plant was associated with the laboring poor, with Indian and Afro-Jamaican communities, and with behaviors that the planter class found threatening to social order.

Rastafarian use

The association of cannabis with Rastafari developed in the 1930s, decades after the plant's arrival with Indian workers. Rastafarian theology incorporated ganja as a sacrament, citing biblical passages about "the herb of the field" and framing cannabis use as spiritual practice rather than intoxication. This spiritual dimension gave Jamaican cannabis culture a religious legitimacy that recreational use alone could not claim — and it made ganja prohibition a matter of religious freedom as well as drug policy.

Vera Rubin and Lambros Comitas's Ganja in Jamaica (Mouton, 1975) remains the foundational anthropological study of Jamaican cannabis culture. Their fieldwork documented ganja's integration into working-class life: as a work aid for agricultural laborers, as a folk medicine, as a social lubricant, and as a religious sacrament. The study found no evidence that moderate ganja use produced the violence, psychosis, or social dysfunction that prohibitionist rhetoric attributed to it.

Rubin and Comitas's fieldwork documented ganja's deep integration into Jamaican working-class life — as a work aid, folk medicine, and social institution — without finding evidence of the harms prohibitionist rhetoric attributed to it.

Rubin &amp; Comitas, <em>Ganja in Jamaica</em>

The northward migration

By the 1910s, labor migration had carried "marijuana" across the Rio Grande into Texas, Arizona, New Mexico, and Louisiana. Mexican workers brought the plant and the practice of smoking it; they also brought the Spanish-derived name that would eventually displace "cannabis" in American public discourse.

The migration was economic, not cultural. Mexican laborers crossed the border to work in agriculture, mining, and railroad construction — industries that demanded cheap labor and tolerated the habits that came with it, until those habits became politically useful as targets. Cannabis smoking among Mexican workers was largely ignored by authorities as long as the workers themselves were economically useful. When anti-Mexican sentiment intensified — during economic downturns, labor disputes, and nativist political campaigns — marijuana became a convenient weapon.

The earliest American state cannabis bans in the Southwest — Texas in 1919, Louisiana in 1924 — were explicitly connected to anti-Mexican and anti-Black sentiment. The drug's name was part of the strategy: legislators and newspaper editors used "marihuana" rather than "cannabis" precisely because the Spanish-derived word sounded foreign and threatening, obscuring the fact that the same plant had been in the American pharmacopoeia for seventy years.

Two streams, one prohibition

The Mexican and Jamaican cannabis traditions were separate in origin — one flowing from Spanish colonial hemp, the other from Indian indenture — but they converged in the early twentieth-century United States. Both associated cannabis with non-white, working-class populations. Both generated moral panics rooted in racial anxiety rather than pharmacological evidence. And both were absorbed into the American prohibition narrative that Anslinger would consolidate in the 1930s.

Understanding these origins matters because the racial dimension of cannabis prohibition is not an accident or a side effect. It was the foundation. The plant was not criminalized because it was dangerous. It was criminalized because the people who used it were politically expendable.