Good read...my favorite excerpt below

https://www.vox.com/22174826/smoking-drinking-cigarettes-health-drunk-driving-vaping-research-marijuana-legalization

No other drug comes close to the staggering fatalities of these two. Illicit fentanyl, which has consumed widespread media attention due to the opioid epidemic in the past few years, was linked to fewer than 30,000 overdose deaths in 2017. And marijuana — another drug that federal law enforcement officials have warned is dangerous — reportedly caused zero overdose deaths in the past few thousand years.