In 1967, because of my concern about the rapidly growing use of the dangerous drug marijuana, I began my studies of the scientific and medical literature with the goal of providing a reasonably objective summary of the data which underlay its prohibition.
Much to my surprise, I found no credible scientific basis for the justification of the prohibition. The assertion that it is a very toxic drug is based on old and new myths. In fact, one of the many exceptional features of this drug is its remarkably limited toxicity. Compared to aspirin, which people are free to purchase and use without the advice or prescription of a physician, cannabis is much safer: there are well over 1000 deaths annually from aspirin in the United States alone, whereas there has never been a death anywhere from marijuana.
