"Our first enquiries were proceeding — without publicity — into the pharmacological and medical aspects, when other developments gave our study new and increased significance. An advertisement in ''The Times'' on 24th July, 1967 represented that the long-asserted dangers of cannabis were exaggerated and that the related law was socially damaging, if not unworkable. This was followed by a wave of debate about these issues in Parliament, the Press and elsewhere, and reports of enquiries, e.g. by the National Council for Civil Liberties. This publicity made more explicit the nature of some current ‘protest’ about official policy on drugs; defined more clearly some of the main issues in our study; and led us to give greater attention to the legal aspects of the problem. Government spokesmen made it clear that any future development of policy on cannabis would have to take account of the Advisory Committee’s Report. Accordingly, we decided to give first priority to presenting our views on cannabis."

"The long term consumption of cannabis in ''moderate'' doses has no harmful effects (…) Cannabis is less dangerous than the opiates, amphetamines and barbiturates, and also less dangerous than alcohol. (…) An increasing number of people, mainly young, in all classes of society are experimenting with this drug, and substantial numbers use it regularly for social pleasure. There is no evidence that this activity is causing violent crime, or is producing in otherwise normal people conditions of dependence or psychosis requiring medical treatment (…) there are indications that (cannabis) may become a functional equivalent of alcohol."