The History of Cannabis: From Ancient Medicine to Modern Culture

Cannabis has been part of human civilization for thousands of years. Long before dispensaries, rolling papers, and Instagram grow accounts existed, people were using this plant for medicine, textiles, spiritual rituals, and yes, getting high. The story of how we went from ancient temple offerings to global prohibition and back toward legalization is one of the more fascinating arcs in the history of any plant.

Ancient Origins

The cannabis plant almost certainly originated in Central Asia, somewhere in the region that includes modern-day Mongolia, southern Siberia, and northwest China. Archaeological evidence suggests humans have been cultivating cannabis for at least 12,000 years, making it one of the oldest cultivated crops on earth.

The earliest written record of cannabis use comes from China, around 2700 BCE. Emperor Shen Nung (a semi-mythical figure sometimes called the father of Chinese medicine) reportedly included cannabis in his pharmacopoeia, recommending it for ailments like rheumatism, malaria, and absent-mindedness. Whether Shen Nung was a real person or a cultural composite is debated, but the records themselves are genuine and incredibly old.

In ancient China, cannabis was primarily valued for its fiber (hemp) and its medicinal properties. The psychoactive uses were known but not the primary focus. Hemp rope, textiles, and paper made from cannabis fiber were important economic products for centuries.

Cannabis in India and the Middle East

Cannabis found a very different cultural role in the Indian subcontinent. In India, the plant has been associated with spiritual and religious practice for millennia. It appears in the Atharva Veda, one of the oldest Hindu sacred texts, dated to around 1500 to 1000 BCE. The text describes cannabis as one of five sacred plants and refers to a "guardian angel" living in its leaves.

Three traditional preparations emerged in Indian culture: bhang (a drink made from cannabis leaves and milk), ganja (smoked flower), and charas (hand-rubbed hashish). Bhang in particular remains legal and widely consumed in India today, especially during festivals like Holi.

From India, cannabis knowledge spread westward through Persia and the Arab world. The use of hashish became widespread across the Middle East and North Africa during the medieval period. Some historians connect the spread of hashish to Sufi mystics who used it as an aid to meditation and spiritual practice, though this connection is debated.

The word "hashish" itself comes from Arabic, and there's a persistent (and probably inaccurate) legend connecting it to the word "assassin" through the Nizari Ismaili sect. It makes for a good story, but most modern historians consider it a folk etymology.

Cannabis Reaches Europe and the Americas

Hemp cultivation arrived in Europe relatively early, probably through Scythian nomads who brought it west from Central Asia. The Scythians, according to the Greek historian Herodotus writing around 440 BCE, would throw cannabis seeds onto hot stones inside enclosed tents and inhale the vapors in what sounds very much like a proto-hotbox situation.

For most of European history though, cannabis was grown primarily as a fiber crop. Hemp was essential for rope, sails, and textiles, and it played a critical role in naval power. The British Empire, the Spanish Armada, and the Dutch trading fleet all relied heavily on hemp rigging and canvas (the word "canvas" actually comes from "cannabis").

Cannabis arrived in the Americas through European colonization. Hemp was grown widely in colonial America, and both George Washington and Thomas Jefferson cultivated it on their estates, primarily for fiber. The psychoactive use of cannabis in the Americas has murkier origins, with some historians tracing it to enslaved African populations and others to Mexican and Caribbean immigrant communities in the 19th and early 20th centuries.

The Road to Prohibition

For most of human history, cannabis was legal pretty much everywhere. The shift toward prohibition began in the early 20th century and was driven more by politics, racism, and economic interests than by any scientific evidence of harm.

In the United States, the anti-cannabis movement gained momentum in the 1930s under Harry Anslinger, the first commissioner of the Federal Bureau of Narcotics. Anslinger ran a public campaign built on racial fearmongering, linking cannabis use to Mexican immigrants and Black jazz musicians. The propaganda was brazen. Claims that marijuana caused insanity, violence, and moral degradation were presented as fact, with zero scientific backing.

The Marihuana Tax Act of 1937 effectively criminalized cannabis at the federal level in the US. Over the following decades, penalties became increasingly harsh, culminating in Nixon's Controlled Substances Act of 1970, which classified cannabis as a Schedule I substance alongside heroin and LSD. This classification was explicitly intended as a tool to target anti-war activists and Black communities, as Nixon's domestic policy advisor John Ehrlichman later admitted in a 1994 interview.

Internationally, cannabis prohibition spread through a combination of US diplomatic pressure and the UN Single Convention on Narcotic Drugs in 1961, which pushed member nations to restrict cannabis. Countries that had long histories of cannabis use, including India and Morocco, found themselves under pressure to criminalize practices that had been part of their cultures for centuries.

The Legalization Movement

The pushback against prohibition began almost immediately but didn't gain serious political traction until the late 20th century. The Netherlands led the way in Europe with its tolerance policy for coffeeshops starting in the 1970s, creating a model for regulated cannabis access that's still in operation today.

In the US, California legalized medical cannabis in 1996 with Proposition 215, becoming the first state to do so. This opened the floodgates. Over the following two decades, state after state followed with medical and then recreational legalization.

Colorado and Washington became the first US states to legalize recreational cannabis in 2012. Canada legalized nationally in 2018, becoming the first G7 country to do so. Uruguay had already legalized in 2013, becoming the very first country in the world to fully legalize recreational cannabis.

In Europe, the movement has been slower but is accelerating. Germany moved toward a partial legalization model in 2024, and several other EU countries are exploring similar approaches. Thailand briefly decriminalized cannabis in 2022, though the policy landscape there continues to shift.

Where We Are Now

Cannabis in 2026 exists in a strange liminal space. It's legal in some countries, decriminalized in others, and still punishable by prison time in many parts of the world. The global legal cannabis market is worth billions and growing, while millions of people still live with criminal records for possessing the same plant.

The science has come a long way. We now understand the endocannabinoid system, the role of terpenes in modulating the cannabis experience, and the medical applications for conditions ranging from epilepsy to chronic pain. But research remains hampered in many countries by the very prohibition laws that were supposed to protect public health.

What's clear is that cannabis isn't going anywhere. It's been with us for 12,000 years of cultivation and thousands more of wild growth before that. The prohibition era, in the grand sweep of history, looks like a relatively brief and misguided interruption in a much longer story of coexistence between humans and this plant.

The story is still being written. But the direction is clear.