Portugal's radical drugs policy is working. Why hasn't the world copied it?

In 2001, ....., Portugal became the first country to decriminalize the possession and consumption of all illicit substances. Rather than being arrested, those caught with a personal supply might be given a warning, a small fine, or told to appear before a local commission – a doctor, a lawyer and a social worker – about treatment, harm reduction, and the support services that were available to them.