Between 1919 and 1933 in the United States, the United States government enacted a prohibition of alcohol, resulting in a national pandemic of racketeering, bootlegging and extortion through the organized crime of the Mafia. Due to the financing of criminality through the black market monopolization of the alcohol trade. The war on (certain) drugs has failed for this identical reason.
The drug trade did make a profit from selling heroin and cocaine in their purest forms, but only to the users that could afford them. The answer this was the manufacturing of drugs such as crack cocaine and crystal meth, highly addictive and cheaply manufacturable drugs that could be sold at a high price to the addict.
Notwithstanding that heroin and cocaine in their purest forms are highly addictive and harmful, the low quality standards of those drugs due to their illegality make them significantly more harmful than if there were quality and safety standards applied as to all legal drugs. The illegality of recreational drugs is the reason the most harmful of them have ever existed.
The definition of medicine, is a chemical that can be created or created from from any substance, of which can successfully cure, or treat any psychological or psychical condition or disease, the positive benefits of such, outweighing the negative side effects. Cannabis is a medicine.
Marijuana is a medicine of which has been scientifically proven to successfully treat and cure an innumerable amount of diseases and conditions. Such as the severe nausea and chronic pain as a side effect of chemotherapy. The pain caused by conditions such as arthritis, fibromyalgia and cystic fibrosis, and the repair of eye tissue as a cure for glaucoma. And those who use marijuana to medicate themselves, including terminally ill cancer patients, are arrested and imprisoned.
The consequences of prohibitionist drug policy is a crime against humanity.