Causality is hard to tease out here, but more importantly, all they're doing is decriminalizing it and offering methadone/buprenorphine maintenance treatments. And the effect on number of addicts has not been good:
> Coca in Bolivia (I am on thin ice, I know too little, but they elected a coca grower as president)
Coca is really not anything. If you've ever chewed coca leaves, they're mildly stimulating. They're nothing like cocaine.
> I think there is plenty of evidence that a considered thoughtful approach to drugs is better
Considered, thoughtful approaches are always better! The question is, what are you considering and being thoughtful about. And the fact of the matter is that the most drug-liberal cities in the US have the worst drug problems, and so do the most drug liberal countries (like Portugal).
The countries that have the fewest problems with addiction are the harshest: Singapore, China, Japan. These things are not an accident. I'm not necessarily advocating adopting policies that harsh, just pointing out that they do actually work, whereas the liberal policies fail disastrously everywhere they're implemented. I'm in favor of criminalization, but only as a tool to force people into deferral/treatment programs. I don't want to see anyone actually put in jail for using drugs, unless they fail to complete their deferral program.
Portugal
Legalisation of capabilities across the globe
Coca in Bolivia (I am on thin ice, I know too little, but they elected a coca grower as president)
I think there is plenty of evidence that a considered thoughtful approach to drugs is better
But the psychopaths and sociopaths that make up the bulk of our governments (here in Aotearoa and in the USA) refuse to pay attention