Very cool read. Might I suggest a book that you might be interested in called Dreamland. It's an investigative journalistic view on the current opioid epidemic.
It details how the pharmaceutical company Purdue convinced doctors nationwide that opium was not addictive and got them to prescribe hundreds of millions of Oxicodone pills to people for any type of pain.
At the same time, cheap Mexican heroin was coming up in nonviolent trafficking cells in almost every major city that didn't already have heroin trafficking.
The result was hundreds of thousands of people, if not millions, making the switch to get addicted to the cheaper Mexican black tar heroin
Much like the rats in the experiment mentioned above, many of these people were on welfare and had lived lives that could have been better, but the vast new majority of addicts came from white suburbs where everything was in substantial excess.
A great read for sure