The Likely Cause of Addiction Has Been Discovered, and It Is Not What You Think, article.
If you get run over today and you break your hip, you will probably be given diamorphine, the medical name for heroin. In the hospital around you, there will be plenty of people also given heroin for long periods, for pain relief. The heroin you will get from the doctor will have a much higher purity and potency than the heroin being used by street-addicts, who have to buy from criminals who adulterate it. So if the old theory of addiction is right -- it's the drugs that cause it; they make your body need them -- then it's obvious what should happen. Loads of people should leave the hospital and try to score smack on the streets to meet their habit.
The funny thing is that this is right in front of our nose, and yet most of us still believe that addiction comes from the drug.
Nearly fifteen years ago, Portugal had one of the worst drug problems in Europe, with 1 percent of the population addicted to heroin. They had tried a drug war, and the problem just kept getting worse. So they decided to do something radically different. They resolved to decriminalize all drugs, and transfer all the money they used to spend on arresting and jailing drug addicts, and spend it instead on reconnecting them -- to their own feelings, and to the wider society. The most crucial step is to get them secure housing, and subsidized jobs so they have a purpose in life, and something to get out of bed for. I watched as they are helped, in warm and welcoming clinics, to learn how to reconnect with their feelings, after years of trauma and stunning them into silence with drugs.
[...] since total decriminalization, addiction has fallen, and injecting drug use is down by 50 percent.