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Yvain comments on The Blue-Minimizing Robot - Less Wrong
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Rats don't always choose drugs over everything else
Summary: An experimenter thought drug addiction in rats might be linked to being kept in distressing conditions, made a Rat Park to test the idea, and found that the rats in the enriched Rat Park environment ignored the morphine on offer.
EDIT: apparently the study had methodological issues and hasn't been replicated, making the results somewhat suspect, as pointed out by Yvain below
I hate to admit I get science knowledge from Reddit, but the past few times this was posted there it was ripped apart by (people who claimed to be) professionals in the field - riddled with metholodogical errors, inconsistently replicated, et cetera. The fact that even its proponents admit the study was rejected by most journals doesn't speak well of it.
I think it's very plausible that situation contributes to addiction; we know that people in terrible situations have higher discount rates than others and so tend to short-term thinking that promotes that kind of behavior, and certainly they have fewer reasons to try to live life as a non-addict. But I think the idea that morphine is no longer interesting and you can't become addicted when you live a stimulating life is wishful thinking.
Damn. Oh well, noted and edited in to the original comment.
Well, like I said, all I have to go on is stuff people said on Reddit and one failed replication study I was able to find somewhere by a grad student of the guy who did the original research. The original research is certainly interesting and relevant and does speak to the problems with a very reductionist model.
This actually gets to the same problem I'm having looking up stuff on perceptual control theory, which is that I expect a controversial theory to be something where there are lots of passionate arguments on both sides, but on both PCT and Rat Park, when I've tried to look them up I get a bunch of passionate people arguing that they're great, and then a few scoffs from more mainstream people saying "That stuff? Nah." without explaining themselves. I don't know whether it's because of Evil Set-In-Their-Ways Mainstream refusing to acknowledge the new ideas, or whether they're just so completely missing the point that people think it's not worth their while to respond. It's a serious problem and I wish that "skeptics" would start addressing this kind of thing instead of debunking ghosts for the ten zillionth time.