@FortyTwo I´d suggest a documentary called A Billion Lives (2016). Setup is quite simple. It´s not tobacco nor nicotine, that causes harm. There´s a lot of added chemicals in regular cigarettes that cause most of the issues.
I am no scientist, but adding things that keep you hooked (with harmful side effects ofc) seems like a good business decision.
Cancer sticks (regular cigs) totally switched out all the other tobacco products. Cigars, pipes, snuff, rapé etc.