[indigo_rex]

I'm not confirming or denying that the US has maybe the worst drug problem in the world - seems plausible. But, on addiction (slightly different, but related), Rat Park is an interesting point of focus.

http://www.huffingtonpost.com/johann-hari/the-real-cause-of-...

[timmaxw]

Follow-up studies were unable to reproduce the Rat Park results.

https://www.ncbi.nlm.nih.gov/pubmed/9148292?dopt=Abstract

https://www.ncbi.nlm.nih.gov/pubmed/2616610?dopt=Abstract

[indigo_rex]

I was not aware. Thank you for the links/correction!