What’s interesting here is that in the drug treatment world it’s basically known that drug abuse is almost always a reaction to some kind of psychological trauma or disorder, and an awful lot of drugs (not just cocaine) play heavily with the dopamine pathways. The idea of dopamine as your brain’s signal that you’re safe fits about as neatly with that as can be.
(Of course, like everything in biology, dopamine also does about a gazillion other things, too, so it’s not quite that cut and dry, but it rhymes, at least.)
> in the drug treatment world it’s basically known that drug abuse is almost always a reaction to some kind of psychological trauma or disorder,
This is not true in the professional world. People engage in drug use for many reasons, including pure recreation.
Trauma can precede relapses or bouts of drug abuse, but it's not a universal explanation.
There are a lot of pop-culture ideas that explain everything away as trauma. These are popular on podcasts, Reddit, and other social media websites. There are also types of therapists who learned to treat trauma and then try to apply that to everything. "If all you have is a hammer, everything looks like a nail". These therapists will try to reframe everything as trauma because it's what they know how to teach.
They often reverse engineer a traumatic backstory as an explanation even when one doesn't exist. You can find podcasters and therapists who will even claim that being born imparts permanent trauma that explains things long into adulthood. There's no evidence behind this claim, but it's convenient for therapists who need to find a traumatic backstory before they can address something because everyone was born at some point.
> The idea of dopamine as your brain’s signal that you’re safe fits about as neatly with that as can be.
That idea is completely wrong, though.
The study is talking about dopamine signaling in one specific location of the brain.
Dopamine is used in other locations in the brain to encode aversive stimuli, among other things.
Dopamine (and other neurotransmitters) don't just do one single thing in the brain. They have diverse effects all over.
Also, many of the drugs that people associated with dopamine actually have much broader effects, such as on norepinephrine (stimulants) and serotonin (cocaine).
There are dopamine agonist drugs that go in and very precisely target different dopamine receptors in the brain, activating them directly. Many people are surprised to learn that a common side effect of these drugs is an irresistible urge to sleep when first taking them, for example.
> in the drug treatment world it’s basically known that drug abuse is almost always a reaction to some kind of psychological trauma or disorder
This is incorrect. While this is true for a substantial number of people, I want to offer some resistance to the pop-psychology axiom that "everything is because of trauma." Not only is is unsupported by science, it has lead to an expansion of the definition of the word "trauma" in popular culture that's so broad as to be nearly useless clinically or scientifically.
I had the unique experience as a youth in attending a school where a substantial portion of the school was funneled there by one of the many 1970s and 1980s troubled teen corporations that spun out of Synanon after it collapsed. This one specialized in drug addicts.
Almost all of my classmates (not me, unfortunately) were from exceptionally wealthy families and excepting one none of them ever mentioned any childhood trauma. Instead they were precocious partiers who got into drugs despite being underage and going to the nightclubs in the seedy part of town - no one at the time was turning away hot young women or gay(for pay or real) young men. And the club scene was a drug scene. It still is.
I don’t think trauma is actually at the root of almost all drug abusers. The only first class abusers (pot and alcohol in serious quantities daily) that I know at the moment grew up in perfectly fine suburban families and are in good, non-narcissistic/controlling/etc relationships with their families. They’re just addicts who can’t stop. One of them is going to die from it, eventually, given his level of alcohol consumption.
(Of course, like everything in biology, dopamine also does about a gazillion other things, too, so it’s not quite that cut and dry, but it rhymes, at least.)