Cannabis History
There is evidence in the pharmacopoeia of Shen Nung, one of the fathers of Chinese medicine of the use of cannabis in ancient China since about 2600 B.C.

Tradition in India maintains that the gods sent man the Hemp plant so that he might attain delight, courage, and have heightened sexual desires. When nectar or Amrita dropped down from heaven, Cannabis sprouted from it. Another story tells how, when the gods, helped by demons, churned the milk ocean to obtain Amrita, one of the resulting nectars was Cannabis. It was consecrated to Shiva and was the godess Indra’s favourite drink. Ever since, this plant of the gods has been held in India to bestow supernatural powers on its users. It is still consumed by some Hindus as Bhang.

In 450 B.C. the Greek historian Herodotus describes the Scythians of central Asia throwing hemp onto heated stones under canvas: 'as it burns, it smokes like incense and the smell of it makes them drunk'.

1563 - Queen Elizabeth I decrees that land owners with 60 acres or more must grow Cannabis else face a £5 fine.

1791 - President Washington sets duties on Cannabis to encourage domestic industry. Jefferson calls Cannabis "a necessity" and urges farmers to grow Cannabis instead of tobacco. It was intended for making sails and cloth from more than for smoking though.

1835 - the Club de Hashichines, whose bohemian membership included the poet Baudelaire, is founded.

1845 - Psychologist and 'inventor' of modern psychopharmacology and drug treatment, Jacques-Joseph Moreau de Tours documents physical and mental benefits of Cannabis.

1890 -
Queen Victoria's personal physician, Sir Russell Reynolds, prescribes Cannabis for menstrual cramps. He claims in the first issue of The Lancet, that Cannabis "When pure and administered carefully, is one of the of the most valuable medicines we possess"

1895 - The Indian Hemp Drug Commission concludes that cannabis has some medical uses, no addictive properties and a number of positive emotional and social benefits. First known use of the word 'marijuana' for smoking, by Pancho Villa's supporters in Sonora Mexico. The song "La Curaracha" tells the story of one of Villa's men looking for his stash of "marijuana por fumar"
1910 - African-American 'reefer' use reported in jazz clubs of New Orleans, and is said to be influencing white people. Mexican's reported to be smoking Cannabis in Texas. Newspapers subsequently ran many stories portraying Negroes and Mexicans as frenzied beasts under the influence of 'Marijuana'.
1924 - At the second International Opiates Conference the Egyptian delegate claims that serious problems are associated with Hashish use and calls for immediate international controls. A Sub-Committee is formed and listens to the Egyptian and Turkish delegations while Britain abstains. The conference declares Cannabis a Narcotic and recommends strict international control.
September 28th 1928 - The Dangerous Drugs Act 1925 becomes law and Cannabis is made illegal in Britain.
1943 - Both the US and German governments urge their patriotic farmers to grow hemp for the war effort. The US shows farmers a short film - 'Hemp for Victory' which the government later pretends never existed.
1967 - In July over 3,000 people hold a mass 'smoke-in' in Hyde Park in London. The same month, The Times carries a pro-legalisation advertisement which declares that "the laws against Marijuana are immoral in principle and unworkable in Practice. The signatories include David Dimbleby, Bernard Levin, and the Beatles.
The most famous bust of all, on the home of Rolling Stone, Keith Richards, uncovered marijuana. Richards and Mick Jagger were sentenced to prison for respectively three months and one year. The sentences prompted an outcry that culminated in Lord Rees Mogg's famous Times editorial 'Who brakes a butterfly on a wheel?' The convictions were quashed on appeal.
1971 - Misuse of Drugs Act lists Cannabis as a Class B drug and bans its medical use despite the recommendation of the Wootton Report that "Preparations of Cannabis and it's derivatives should continue to be available on prescription for purposes of medical treatment and research". President Nixon declares drugs "America's public enemy No. 1".
1990 - The discovery of THC receptors in the human brain is reported in Nature.
October 2001 - The New Labour government sets up a Select Committee to look at drugs policy. When giving evidence the Home Secretary (David Blunkett) announces his intention to move cannabis from class B to class C, making possession a non-arrestable offence.
January 2004 - cannabis is downgraded to a Class C drug in the UK, but the law relating to possession with intent to supply Class C drugs was changed so as to make most of the changes meaningless. The government spends 1 million pounds on an advertising campaign to tell people nothing had changed and that Cannabis is still illegal.
2008 - ACMD reports that cannabis should remain class C. Research carried out for the Home Office but never made public is leaked by the Guardian and shows incidence of psychosis has actually dropped during the time cannabis use increased. Gordon Brown ignores the ACMD advice and announces cannabis will be returned to class B.
2009 - Cannabis upgraded to a Class B drug again, but legislation passed to meet cannabis possession with an £80 fine.