Antiquity and Early Use (c. 10,000 BCE - 600 CE)

The history of cannabis is deeply intertwined with human civilization, with evidence of its use spanning millennia across various cultures for fiber, food, medicine, and spiritual practices.

Asia: Earliest Evidence

The earliest archaeological evidence of cannabis dates back to ancient Asia.

• Neolithic China (c. 10,000 BCE): Hemp fibers were used to make clothing, rope, and paper. The seeds were also used as a source of food.
• Siberia (c. 3000 BCE): Scythian burial mounds have revealed cannabis seeds and burnt remains, suggesting ritualistic use.
• India (c. 2000 - 1400 BCE): Mentioned in the Atharvaveda as one of the five sacred plants. It was used in religious rituals (as bhang) and in Ayurvedic medicine to treat various ailments.

Middle East and Europe

• Ancient Egypt (c. 1200 BCE): Cannabis has been identified in the remains of some mummies and was likely used medicinally.
• Ancient Greece and Rome: Physicians like Galen and Dioscorides documented the use of cannabis seeds and extracts for treating earache, edema, and inflammation.

Global Expansion and Medieval Use (c. 600 - 1500)

Cannabis continued its spread along trade routes, becoming integrated into the medical and cultural practices of the Islamic world and beyond.

Region	Period	Primary Use	Notable Mention
Islamic World	8th - 18th Centuries	Medicine, Recreation	Persian physician Avicenna documented its use for treating headache in The Canon of Medicine.
Europe (Medieval)	6th - 15th Centuries	Fiber (Hemp)	Primarily used for making ropes, sails, and clothing, essential for maritime nations.
Africa	12th - 16th Centuries	Social, Ritual	Evidence suggests early use in Central and Southern Africa for recreational and spiritual purposes.

The Colonial Era and Global Cultivation (c. 1500 - 1900)

During the age of exploration, hemp was a critical crop for naval powers, and cannabis preparations were introduced to the Western pharmacopeia.

• North America: Hemp cultivation was mandated in the colonies due to the need for ropes and sail canvas. George Washington and Thomas Jefferson were known to have grown hemp.
• Western Medicine (19th Century): Irish physician William O'Shaughnessy introduced cannabis's therapeutic potential to Western medicine in the 1830s after observing its use in India. It was widely used in tinctures to treat muscle spasms, pain, and insomnia.

Prohibition and the 20th Century (c. 1900 - 2000)

The 20th century saw a dramatic shift in the perception and legal status of cannabis in the United States and globally.

Early 20th Century: Rising Restriction

Growing concerns, often fueled by xenophobia and sensationalist media (e.g., "Reefer Madness"), led to the first restrictions.

• 1937: The Marihuana Tax Act in the United States effectively outlawed cannabis nationwide by imposing prohibitive taxes.
• 1961: The United Nations Single Convention on Narcotic Drugs classified cannabis as a Schedule IV substance, the most restrictive category, urging signatory nations to prohibit its cultivation and use except for research.

Counterculture and Criminalization

• 1960s - 1970s: Cannabis became strongly associated with the counterculture movement, leading to increased criminalization under the War on Drugs.
• 1970: The Controlled Substances Act repealed the Marihuana Tax Act and classified cannabis as a Schedule I drug, defining it as having "no currently accepted medical use" and a high potential for abuse.

Modern Era: Reform and Reassessment (c. 2000 - Present)

The beginning of the 21st century has been marked by a global reassessment of cannabis policy, driven by medical research and changing public opinion.

• Medical Legalization: California was the first state to legalize medical cannabis in 1996. Since then, many other U.S. states and countries (e.g., Canada, Israel) have followed suit.
• Recreational Legalization: Colorado and Washington became the first U.S. states to legalize recreational cannabis in 2012. Canada legalized adult-use cannabis nationwide in 2018.