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The history of cannabis and its usage by humans dates back to at least the third millennium BC in written history, and possibly as far back as the
Pre-Pottery Neolithic B Pre-Pottery Neolithic B (PPNB) is part of the Pre-Pottery Neolithic, a Neolithic culture centered in upper Mesopotamia and the Levant, dating to years ago, that is, 8800–6500 BC. It was typed by British archaeologist Kathleen Kenyon durin ...
(8800–6500 BCE) based on archaeological evidence. For millennia, the plant has been valued for its use for fiber and rope, as food and medicine, and for its psychoactive properties for religious and recreational use. The earliest restrictions on
cannabis ''Cannabis'' () is a genus of flowering plants in the family Cannabaceae. The number of species within the genus is disputed. Three species may be recognized: '' Cannabis sativa'', '' C. indica'', and '' C. ruderalis''. Alternative ...
were reported in the Islamic world by the 14th century. In the 19th century, it began to be restricted in colonial countries, often associated with racial and class stresses. In the middle of the 20th century, international coordination led to sweeping restrictions on cannabis throughout most of the globe. Entering the 21st century, some nations began to take measures to decriminalize or legalize cannabis.


Ancient uses

Hemp is possibly one of the earliest plants to be cultivated. Cannabis has been cultivated in Japan since the pre-Neolithic period for its fibres and as a food source and possibly as a psychoactive material. An archeological site in the
Oki Islands The is an archipelago in the Sea of Japan, the islands of which are administratively part of Oki District, Shimane Prefecture, Japan. The islands have a total area of . Only four of the around 180 islands are permanently inhabited. Much of the ...
near Japan contained cannabis achenes from about 8000 BC, probably signifying use of the plant. Hemp use archaeologically dates back to the
Neolithic Age The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several pa ...
in China, with hemp fiber imprints found on
Yangshao culture The Yangshao culture (仰韶文化, pinyin: Yǎngsháo wénhuà) was a Neolithic culture that existed extensively along the middle reaches of the Yellow River in China from around 5000 BC to 3000 BC. The culture is named after the Yangsh ...
pottery dating from the
5th millennium BC The 5th millennium BC spanned the years 5000 BC to 4001 BC (c. 7 ka to c. 6 ka). It is impossible to precisely date events that happened around the time of this millennium and all dates mentioned here are estimates mostly based on geological an ...
. The Chinese later used hemp to make clothes, shoes, ropes, and an early form of
paper Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood, rags, grasses or other vegetable sources in water, draining the water through fine mesh leaving the fibre evenly distrib ...
. Cannabis was an important crop in ancient Korea, with samples of hempen fabric discovered dating back as early as 3000 BC. Cannabis is believed to be consumed by Hindu God Shiva, and has been part of Hindu practice and culture. Hemp is called ''ganja'' ( sa, गञ्जा, IAST: ) in
Sanskrit Sanskrit (; attributively , ; nominally , , ) is a classical language belonging to the Indo-Aryan branch of the Indo-European languages. It arose in South Asia after its predecessor languages had diffused there from the northwest in the late ...
and other modern
Indo-Aryan languages The Indo-Aryan languages (or sometimes Indic languages) are a branch of the Indo-Iranian languages in the Indo-European languages, Indo-European language family. As of the early 21st century, they have more than 800 million speakers, primarily ...
. Some scholars suggest that the ancient drug
soma Soma may refer to: Businesses and brands * SOMA (architects), a New York–based firm of architects * Soma (company), a company that designs eco-friendly water filtration systems * SOMA Fabrications, a builder of bicycle frames and other bicycle ...
, mentioned in the
Veda upright=1.2, The Vedas are ancient Sanskrit texts of Hinduism. Above: A page from the '' Atharvaveda''. The Vedas (, , ) are a large body of religious texts originating in ancient India. Composed in Vedic Sanskrit, the texts constitute the ...
s, was cannabis, although this theory is disputed. ''Bhanga'' is mentioned in several Indian texts dated before 1000 AD. However, there is
philological Philology () is the study of language in oral and written historical sources; it is the intersection of textual criticism, literary criticism, history, and linguistics (with especially strong ties to etymology). Philology is also defined as t ...
debate among Sanskrit scholars as to whether this ''bhanga'' can be identified with modern ''
bhang Bhang (IAST: ''Bhāṅg'') is an edible preparation made from the leaves of the cannabis plant originating from the Indian subcontinent. It has been used in food and drink as early as 1000 BC in ancient India. Bhang is traditionally distribu ...
'' or cannabis. Cannabis was also known to the
ancient Assyrians Assyria ( Neo-Assyrian cuneiform: , romanized: ''māt Aššur''; syc, ܐܬܘܪ, ʾāthor) was a major ancient Mesopotamian civilization which existed as a city-state at times controlling regional territories in the indigenous lands of the A ...
, who potentially utilized it as an aromatic. They called it ''qunabu'' and ''qunubu'' (which could signify "a way to produce smoke"), a potential origin of the modern word "cannabis". Cannabis was introduced as well to the
Scythia Scythia (Scythian: ; Old Persian: ; Ancient Greek: ; Latin: ) or Scythica (Ancient Greek: ; Latin: ), also known as Pontic Scythia, was a kingdom created by the Scythians during the 6th to 3rd centuries BC in the Pontic–Caspian steppe. Hi ...
ns,
Thracians The Thracians (; grc, Θρᾷκες ''Thrāikes''; la, Thraci) were an Indo-European speaking people who inhabited large parts of Eastern and Southeastern Europe in ancient history.. "The Thracians were an Indo-European people who occupied t ...
and
Dacia Dacia (, ; ) was the land inhabited by the Dacians, its core in Transylvania, stretching to the Danube in the south, the Black Sea in the east, and the Tisza in the west. The Carpathian Mountains were located in the middle of Dacia. It ...
ns, whose
shamans Shamanism is a religious practice that involves a practitioner (shaman) interacting with what they believe to be a spirit world through altered states of consciousness, such as trance. The goal of this is usually to direct spirits or spiritu ...
(the ''
kapnobatai Kapnobatai or capnobatae ( grc, καπνοβάται; la, capnobatae), meaning "''those who walk on/in smoke/clouds''" was one of the names given to the Mysians of Thrace (geographical and historical region in Southeast Europe, now split among Bul ...
''—"those who walk on smoke/clouds") burned cannabis flowers to induce
trance Trance is a state of semi-consciousness in which a person is not self-aware and is either altogether unresponsive to external stimuli (but nevertheless capable of pursuing and realizing an aim) or is selectively responsive in following the dir ...
. The classical Greek historian
Herodotus Herodotus ( ; grc, , }; BC) was an ancient Greek historian and geographer A geographer is a physical scientist, social scientist or humanist whose area of study is geography, the study of Earth's natural environment and human society ...
(ca. 480 BC) reported that the inhabitants of
Scythia Scythia (Scythian: ; Old Persian: ; Ancient Greek: ; Latin: ) or Scythica (Ancient Greek: ; Latin: ), also known as Pontic Scythia, was a kingdom created by the Scythians during the 6th to 3rd centuries BC in the Pontic–Caspian steppe. Hi ...
would often inhale the vapors of hemp-seed smoke, both as ritual and for their own pleasurable recreation. Cannabis residues have been found on two altars in
Tel Arad Tel Arad ( he, תל ערד), in Arabic Tell 'Arad (تل عراد), is an archaeological tell, or mound, located west of the Dead Sea, about west of the modern Israeli city of Arad in an area surrounded by mountain ridges which is known as the ...
, dated to the
Kingdom of Judah The Kingdom of Judah ( he, , ''Yəhūdā''; akk, 𒅀𒌑𒁕𒀀𒀀 ''Ya'údâ'' 'ia-ú-da-a-a'' arc, 𐤁𐤉𐤕𐤃𐤅𐤃 ''Bēyt Dāwīḏ'', " House of David") was an Israelite kingdom of the Southern Levant during the Iron Age. C ...
in the 8th century BC. Its discoverers believe that the evidence points to the use of cannabis for ritualistic psychoactive use in Judah. According to Zohar Amar the fact that the Tel Arad altar was eventually closed down (apparently due to religiously opposition by
Hezekiah Hezekiah (; hbo, , Ḥīzqīyyahū), or Ezekias); grc, Ἐζεκίας 'Ezekías; la, Ezechias; also transliterated as or ; meaning "Yahweh, Yah shall strengthen" (born , sole ruler ), was the son of Ahaz and the 13th king of Kingdom of Jud ...
), and the Biblical prohibition on priestly service while intoxicated by wine (), indicate that Israelite religion in general was probably opposed to cannabis use as part of its priestly services. Cannabis has an ancient history of ritual use and is found in pharmacological cults around the world. Hemp seeds discovered by archaeologists at Pazyryk suggest early ceremonial practices like eating by the Scythians occurred during the 5th to 2nd century BC confirming previous historical reports by
Herodotus Herodotus ( ; grc, , }; BC) was an ancient Greek historian and geographer A geographer is a physical scientist, social scientist or humanist whose area of study is geography, the study of Earth's natural environment and human society ...
. In China, the psychoactive uses of cannabis is described in the '' Shennong Bencaojing'', written around the 3rd century AD.
Daoist Taoism (, ) or Daoism () refers to either a school of philosophical thought (道家; ''daojia'') or to a religion (道教; ''daojiao''), both of which share ideas and concepts of Chinese origin and emphasize living in harmony with the '' Tao ...
s mixed cannabis with other ingredients, then placed them in incense burners and inhaled the smoke.


Global spread

Around the turn of the millennium, the use of hashish (cannabis resin) began to spill over from the Persian world into the Arab world. Cannabis was allegedly introduced to Iraq in 1230 AD, during the reign of Caliph Al-Mustansir Bi'llah, by the entourage of Bahraini rulers visiting Iraq. Hashish was introduced to Egypt by " mystic Islamic travelers" from Syria sometime during the Ayyubid dynasty in the 12th century AD. Hashish consumption by Egyptian
Sufis Sufism ( ar, ''aṣ-ṣūfiyya''), also known as Tasawwuf ( ''at-taṣawwuf''), is a mystic body of religious practice, found mainly within Sunni Islam but also within Shia Islam, which is characterized by a focus on Islamic spirituality, r ...
has been documented as occurrent in the thirteenth century AD, and a unique type of cannabis referred to as
Indian hemp Indian hemp may refer to any of various fiber bearing plan ...
was also documented during this time. Smoking did not become common in the Old World until after the introduction of tobacco, so up until the 1500s hashish in the Muslim world was consumed as an edible. Cannabis is thought to have been introduced to Africa by Indian Hindu travelers, which
Bantu Bantu may refer to: *Bantu languages, constitute the largest sub-branch of the Niger–Congo languages *Bantu peoples, over 400 peoples of Africa speaking a Bantu language * Bantu knots, a type of African hairstyle *Black Association for National ...
settlers subsequently introduced to southern Africa when they migrated southward. Smoking pipes uncovered in Ethiopia and carbon-dated to around 1320 AD were found to have traces of cannabis. It was already in popular use in South Africa by the indigenous Khoisan and Bantu peoples prior to European settlement in the Cape in 1652. By the 1850s, Swahili traders had carried cannabis from the east coast of Africa, to the Congo Basin in the west. King Henry VIII of England strongly encouraged hemp cultivation in the early sixteenth century, particularly for its use by the expanding English navy. The Spaniards brought
industrial hemp Hemp, or industrial hemp, is a botanical class of ''Cannabis sativa'' cultivars grown specifically for industrial or medicinal use. It can be used to make a wide range of products. Along with bamboo, hemp is among the fastest growing plants o ...
to the Western Hemisphere and cultivated it in
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...
starting about 1545. In 1607, "hempe" was among the crops Gabriel Archer observed being cultivated by the natives at the main
Powhatan The Powhatan people (; also spelled Powatan) may refer to any of the indigenous Algonquian people that are traditionally from eastern Virginia. All of the Powhatan groups descend from the Powhatan Confederacy. In some instances, The Powhatan ...
village, where Richmond, Virginia is now situated; and in 1613, Samuell Argall reported wild hemp "better than that in England" growing along the shores of the upper Potomac. As early as 1619, the first Virginia
House of Burgesses The House of Burgesses was the elected representative element of the Virginia General Assembly, the legislative body of the Colony of Virginia. With the creation of the House of Burgesses in 1642, the General Assembly, which had been establishe ...
passed an Act requiring all planters in Virginia to sow "both English and Indian" hemp on their plantations. During
Napoléon Bonaparte Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader who ...
's invasion of Egypt in 1798, alcohol was not available per Egypt being an Islamic country. In lieu of alcohol, Bonaparte's troops resorted to trying hashish, which they found to their liking. Following an 1836–1840 travel in North Africa and the Middle East, French physician
Jacques-Joseph Moreau Jacques-Joseph Moreau (3 June 1804 – 26 June 1884), nicknamed "Moreau de Tours", was a French psychiatrist and member of the Club des Hashischins. Moreau was the first physician to do systematic work on drugs' effects on the central nervo ...
wrote on the psychological effects of cannabis use; Moreau was a member of Paris'
Club des Hashischins The Club des Hashischins (sometimes also spelled Club des Hashishins or Club des Hachichins, "Club of the Hashish-Eaters") was a Parisian group dedicated to the exploration of drug-induced experiences, notably with hashish.Levinthal, C. F. (2012) ...
(founded in 1844). In 1842, Irish physician William Brooke O'Shaughnessy, who had studied the drug while working as a medical officer in Bengal with the East India company, brought a quantity of cannabis with him on his return to Britain, provoking renewed interest in the West. Examples of classic literature of the period featuring cannabis include '' Les paradis artificiels'' (1860) by
Charles Baudelaire Charles Pierre Baudelaire (, ; ; 9 April 1821 – 31 August 1867) was a French poet who also produced notable work as an essayist and art critic. His poems exhibit mastery in the handling of rhyme and rhythm, contain an exoticism inherited ...
and '' The Hasheesh Eater'' (1857) by
Fitz Hugh Ludlow Fitz Hugh Ludlow, sometimes seen as Fitzhugh Ludlow (September 11, 1836 – September 12, 1870), was an American author, journalist, and explorer; best known for his autobiographical book '' The Hasheesh Eater'' (1857). Ludlow also wrote about h ...
.


Early restrictions

Jurisdictions around the world banned cannabis at various times since the
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire ...
. Perhaps the earliest was Soudoun Sheikouni, the emir of the Joneima in
Arabia The Arabian Peninsula, (; ar, شِبْهُ الْجَزِيرَةِ الْعَرَبِيَّة, , "Arabian Peninsula" or , , "Island of the Arabs") or Arabia, is a peninsula of Western Asia, situated northeast of Africa on the Arabian Plat ...
who prohibited use in the 1300s. In 1787, King
Andrianampoinimerina Andrianampoinimerina () (1745–1810) ruled the Kingdom of Imerina on Madagascar from 1787 until his death. His reign was marked by the reunification of Imerina following 77 years of civil war, and the subsequent expansion of his kingdom into n ...
of
Madagascar Madagascar (; mg, Madagasikara, ), officially the Republic of Madagascar ( mg, Repoblikan'i Madagasikara, links=no, ; french: République de Madagascar), is an island country in the Indian Ocean, approximately off the coast of East Africa ...
took the throne, and soon after banned cannabis throughout the
Merina Kingdom The Merina Kingdom, or Kingdom of Madagascar, officially the Kingdom of Imerina (–1897), was a pre-colonial state off the coast of Southeast Africa that, by the 19th century, dominated most of what is now Madagascar. It spread outward from I ...
, implementing capital punishment as the penalty for its use. As European colonial powers absorbed or came into contact with cannabis-consuming regions, the cannabis habit began to spread to new areas under the colonial umbrella, causing some alarm among authorities. After his invasion of
Egypt Egypt ( ar, مصر , ), officially the Arab Republic of Egypt, is a transcontinental country spanning the northeast corner of Africa and southwest corner of Asia via a land bridge formed by the Sinai Peninsula. It is bordered by the Medit ...
Syria (1798-1801),
Napoleon Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader who ...
banned cannabis use among his soldiers. Cannabis was introduced to Brazil either by the Portuguese colonists or by African slaves in the early 1800s. Their intent may have been to cultivate hemp fiber, but the slaves the Portuguese imported from Africa were familiar with cannabis and used it psychoactively, leading the Municipal Council of Rio de Janeiro in 1830 to prohibit bringing cannabis into the city, and punishing its use by any slave. Similarly, the British practice of transporting Indian indentured workers throughout the empire had the result of spreading the longstanding cannabis practices. Concerns about use of ''gandia'' by laborers led to a ban in British Mauritius in 1840, and use of ''ganja'' by Indian laborers in British Singapore led to its banning there in 1870. In 1870, Natal (now in South Africa) passed the ''Coolie Law Consolidation'' prohibiting "the smoking, use, or possession by and the sale, barter, or gift to, any Coolies ndian indentured workerswhatsoever, of any portion of the hemp plant (Cannabis sativa)..." Attempts at criminalising cannabis in British India were made, and mooted, in 1838, 1871, and 1877. In 1894, the British Indian government completed a wide-ranging study of cannabis in India. The report's findings stated: In the late 1800s, several countries in the Islamic world and its periphery banned cannabis, with the
Khedivate of Egypt The Khedivate of Egypt ( or , ; ota, خدیویت مصر ') was an autonomous tributary state of the Ottoman Empire, established and ruled by the Muhammad Ali Dynasty following the defeat and expulsion of Napoleon Bonaparte's forces which br ...
banning the importation of cannabis in 1879, Morocco strictly regulating cannabis cultivation and trade (while allowing several Rif tribe to continue to produce) in 1890, and Greece's ban on hashish in 1890. At the start of the 20th century, more countries continued to ban cannabis. In the United States, the first restrictions on sale of cannabis came in 1906 (in
District of Columbia ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...
). It was outlawed by the Ganja Law in Jamaica (then a British colony) in 1913, in
South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. It is bounded to the south by of coastline that stretch along the Atlantic Ocean, South Atlantic and Indian Oceans; to the ...
in 1922, and in the United Kingdom and New Zealand in the 1920s. Canada criminalized cannabis in ''The Opium and Narcotic Drug Act, 1923'', before any reports of the use of the drug in Canada.


International regulation

In 1925 a compromise was made at an international conference in
The Hague The Hague ( ; nl, Den Haag or ) is a city and municipality of the Netherlands, situated on the west coast facing the North Sea. The Hague is the country's administrative centre and its seat of government, and while the official capital o ...
about the International Opium Convention that banned exportation of "Indian hemp" to countries that had prohibited its use, and requiring importing countries to issue certificates approving the importation and stating that the shipment was required "exclusively for medical or scientific purposes". It also required parties to "exercise an effective control of such a nature as to prevent the illicit international traffic in Indian hemp and especially in the resin". In the United States in 1937, the
Marihuana Tax Act The Marihuana Tax Act of 1937, , was a United States Act that placed a tax on the sale of cannabis. The H.R. 6385 act was drafted by Harry Anslinger and introduced by Rep. Robert L. Doughton of North Carolina, on April 14, 1937. The Seventy-fift ...
was passed, and prohibited the production of hemp in addition to cannabis. The reasons that hemp was also included in this law are disputed—several scholars have claimed that the act was passed in order to destroy the US hemp industry, Shortly thereafter the United States was forced back to promoting rather than discouraging hemp cultivation; hemp was used extensively by the United States during World War II to make uniforms, canvas, and rope. Much of the hemp used was cultivated in
Kentucky Kentucky ( , ), officially the Commonwealth of Kentucky, is a state in the Southeastern region of the United States and one of the states of the Upper South. It borders Illinois, Indiana, and Ohio to the north; West Virginia and Virginia ...
and the Midwest. During World War II, the U.S. produced a short 1942 film, ''
Hemp for Victory ''Hemp for Victory'' is a black-and-white United States government film made during World War II and released in 1942, explaining the uses of hemp, encouraging farmers to grow as much as possible. During World War II, the Marihuana Tax Act of 1 ...
'', promoting hemp as a necessary crop to win the war. In Western Europe, the cultivation of hemp was not legally banned by the 1930s, but the commercial cultivation stopped by then, due to decreased demand compared to increasingly popular artificial fibers. In the early 1940s, world production of hemp fiber ranged from 250,000 to 350,000 metric tonnes,
Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
was the biggest producer.


Liberalizing and legalizing

In 1972, the Dutch government divided drugs into more- and less-dangerous categories, with cannabis being in the lesser category. Accordingly, possession of 30 grams or less was made a misdemeanor. Cannabis has been available for recreational use in
coffee shops A coffeehouse, coffee shop, or café is an establishment that primarily serves coffee of various types, notably espresso, latte, and cappuccino. Some coffeehouses may serve cold drinks, such as iced coffee and iced tea, as well as other non-caf ...
since 1976. Cannabis products are only sold openly in certain local "coffeeshops" and possession of up to 5 grams for personal use is decriminalised, however: the police may still confiscate it, which often happens in car checks near the border. Other types of sales and transportation are not permitted, although the general approach toward cannabis was lenient even before official
decriminalisation Decriminalization or decriminalisation is the reclassification in law relating to certain acts or aspects of such to the effect that they are no longer considered a crime, including the removal of criminal penalties in relation to them. This refor ...
. Cannabis began to attract renewed interest as medicine in the 1970s and 1980s, in particular due to its use by cancer and AIDS patients who reported relief from the effects of
chemotherapy Chemotherapy (often abbreviated to chemo and sometimes CTX or CTx) is a type of cancer treatment that uses one or more anti-cancer drugs ( chemotherapeutic agents or alkylating agents) as part of a standardized chemotherapy regimen. Chemothe ...
and
wasting syndrome Cachexia () is a complex syndrome associated with an underlying illness, causing ongoing muscle loss that is not entirely reversed with nutritional supplementation. A range of diseases can cause cachexia, most commonly cancer, congestive heart f ...
. In 1996,
California California is a state in the Western United States, located along the Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the most populous U.S. state and the 3rd largest by area. It is also the m ...
became the first U.S. state to legalize medical cannabis in defiance of federal law. In 2001,
Canada Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, covering over , making it the world's second-largest country by tot ...
became the first country to adopt a system regulating the medical use of cannabis. In 2001, Portugal decriminalized all drugs, maintaining the prohibition on production and sale, but changing personal possession and use from a criminal offense to an administrative one. Subsequently, a number of European and Latin American countries decriminalized cannabis, such as Belgium (2003), Chile (2005), Brazil (2006), and the Czech Republic (2010). In Uruguay, President Jose Mujica signed legislation to legalize recreational cannabis in December 2013, making Uruguay the first country in the modern era to legalize cannabis. In August 2014, Uruguay legalized growing up to six plants at home, as well as the formation of growing clubs, a state-controlled
marijuana dispensary A cannabis shop, cannabis dispensary, or cannabis cooperative, is a location at which cannabis is sold for recreational or medical use. In the Netherlands these are called coffeeshops. In the United States they exist as an outlet for both recr ...
regime. In Canada, following the 2015 election of
Justin Trudeau Justin Pierre James Trudeau ( , ; born December 25, 1971) is a Canadian politician who is the 23rd and current prime minister of Canada. He has served as the prime minister of Canada since 2015 and as the leader of the Liberal Party since 2 ...
and formation of a Liberal government, in 2017 the House of Commons passed a bill to legalize cannabis on 17 October 2018. Some U.S. states have legalized marijuana, but Peter Reuter argues that restricting promotion of marijuana once it is legal is more complex than it may initially appear. The United Nations' ''World Drug Report'' stated that cannabis "was the world's most widely produced, trafficked, and consumed drug in the world in 2010", identifying that between 128 million and 238 million users globally in 2015.


See also

* History of medical cannabis * Timeline of cannabis law


Further reading

*Mills, James H. (2016
The IHO as actor : the case of cannabis and the Single Convention on Narcotic Drugs 1961
''Hygiea Internationalis'', 13 (1). pp. 95–115. ISSN 1404-4013


References

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