"Hart is known for his research on drug abuse and drug addiction, for his advocacy for the decriminalization of recreational drugs, for his controversial view t

"Hart is known for his research on drug abuse and drug addiction, for his advocacy for the decriminalization of recreational drugs, for his controversial view that drug use is not necessarily unhealthy, and for his acknowledged use of heroin." https://en.wikipedia.org/wiki/Carl_Hart https://en.wikipedia.org/wiki/Carl_Hart