If the history of Cannabis and humankind was a day, prohibition would only be its last 30 seconds.
From time immemorial Cannabis has grown, been grown, and used for countless purposes. Worldwide, Cannabis provided clothing, food, feed and bedding for livestock, medicine, and a spiritual and social enhancer. But things changed brutally, only a hundred years ago.
The modern prohibition of Cannabis sativa L. plant (also known as hemp, marihuana, भांग, dagga, конопля, ganja, 麻, pot, ntsangu, haschisch, canapa, riamba, قنب, siddhi, kif, cáñamo, bangui, 大麻, chanvre, konopí…) originated before 1925 in Brazil, Egypt, and South Africa. The USA came much, much later.
But it was only in 1925 that Cannabis acquired a marked world character that continues to this day, as it entered international law for the first time.
The “2025 Centenary of Cannabis Prohibition–Global Cannabis History Year” has been a global collective catharsis, looking back at 100 years of negative history –since the 1925 Geneva Opium Convention first brought “Indian hemp” under international drug control. Meanwhile, cannabis also entered the International Pharmacopea in the same year. Together we started to re-examine this dual history in light of the millenia of positive interactions with Cannabis sativa L. by all human societies. During 99% of human history cannabis was neither prohibited nor problematic. We will do it again!
Cannabis Embassy – Legatio Cannabis – 大麻大使馆 – سفارة القنب (Decision 2024/GOV/12/03)
1925 marked the birth of international treaty control over Cannabis/hemp
In 1925 (29 September), the Brussels Pharmacopoeia Treaty included for the first time Cannabis (herb, extract, tincture) in the International Pharmacopoeia, alongside other important medicines.
In 1925 also (19 February), the Geneva Opium Convention included “Indian hemp,” upon request from Egypt. For the first time, Cannabis had become an internationally-controlled drug. The conservative Brazilian, Egyptian, and South African governments had managed to extend to the entire planet their racist, colonially-biased, and intolerant views of an ancestral plant. The 1925 Opium Convention generated a descendance of treaties that continue to be in force worldwide today (like the Single Convention on Narcotic Drugs of 1961).
5R, the Next Hundred Years: Re-legalisation and Regulation & Respect, Remedy and Reparations
After a century of failed global experiment of prohibition, time has come to work on the post-prohibition era. The Cannabis Embassy and its partners have embarked on a journey for the next 100 years that goes through the safeguard, promotion, defense, diffusion, and recognition of the cannabis-human relationships and their positive impacts on our societies. The Cannabis Embassy continues to advance the rights of people who cultivate, use, like the Cannabis plant and its products –or simply happen to live by places where Cannabis grows or is being grown– and want peace. In the coming century, this means working on the conservation of cannabis ecosystems and the safeguarding of cannabis cultures, both forming part of a shared natural and intangible heritage of humankind, that survived a century of repression and attempts of eradication.
We all deserve peace, and we will continue to work towards bringing peaceful drug policy solution to the failed global war on drugs. For more information, check our our CESCR contribution, GRATK portal, and our UNESCO page.
External links
- Newsweed: “L’UNESCO met pour la première fois le Cannabis à l’honneur dans la politique culturelle mondiale” — France, 16 September 2025
- Business of Cannabis: “UNESCO’s Mondiacult to Spotlight Cannabis in Global Cultural Policy for First Time” — United Kingdom, 10 September 2025
- Tercera Información: “Barcelona marca un punto de inflexión histórico para la liberación del cannabis” — España, 9 September 2025
- High Times: “A Century Underground: 100 Years of Cannabis Prohibition” — USA, 1 September 2025
- Hampa Magasinet: “Från Genève 1925 till Cannabisrenässansen: Ett sekel av kontroll, kamp och återupprättelse” — Sweden, 1 August 2025
- NORML France: “La Cannaparade dit « STOP » à 100 ans de prohibition” — France, 14 May 2025
- Journal of Pharmaceutical Policy and Practice: “1925–2025: a century of international pharmaceutical law” — United Kingdom, 7 March 2025
- League of Human Right France (Ligue des Droits de l’Homme) Appel Cannaparade 2025 « Stop ! 100 ans de prohibition » — France, 5 May 2025
- ENCOD: “CND68 – ENCOD side event “1925-2025 : One centenary of Cannabis as a narcotic drug under international control”” — Austria, 28 February 2025
- CannabisTherapy: “Centenary of Cannabis Prohibition: Global Cannabis History Year” — Czech republic, 27 February 2025
- Fields of Green for ALL: “1925 – 2025 The Centenary Of Cannabis Prohibition” — South Africa, 19 February 2025
- BeenieWords: “100 Years of Cannabis Prohibition: Time for abolition, not just legalization” — Ghana, 19 February 2025
- Kannabia: “Los hitos más destacados del sector del cannabis para este año 2025” — Spain, 2 January 2025
- Centenary of International Organisations sponsored by History of International Organizations Network: “Centenary of Cannabis Prohibition” — Switzerland, 1 January 2025
- Cannabis Psychedelics: “2025 – Centenary of Cannabis Prohibition” — Australia, 19 December 2024
- Legalize Cannabis Queensland: “2025 – Centenary of Cannabis Prohibition” — Australia, 31 October 2024
Photo Gallery 2025 United Nations Commission on Narcotic Drugs: Action, Expo, and Discussion on the Centenary of Cannabis Prohibition
Photo Gallery Escapade in Geneva for Commemoration & Research, 19 February 2025
Photo Gallery The “Palais des Académies” in Brussels (Palace of the Prince of Orange): where Cannabis was added to the International Pharmacopoeia on 29 September 1925
Photo Gallery The “Salle F” in the Palais Wilson, Geneva (Orange Room, Hôtel National): where Cannabis was added to the International Drug Control System on 19 February 1925







