For the record, when I said "pot hasn't killed anyone in recorded history", what I should have said was "no one has ever overdosed from pot". I admit that what I said the first time was an exaggeration. I was strictly talking about the physical harm to the body, which is hardly any truthfully.
I like when people use this. It's like when little children tell you the stars are holes poked in a blanket over the world. Very cute.
The actual facts are that there are plenty of deaths contributed to marijuana but none directly contributed to an overdose of marijuana
in the U.S.* The primary chemical in marijuana is THC, of which there have been fatal overdoses recorded by the U.S. FDA. There's a difference there - you could say the coca leaf doesn't kill anyone, but cocaine kills plenty. The majority might consume marijuana as dried leaves, but there are plenty that refine it into oils, hash and even inject-able liquids. Tarballs (not the Linux kind) kill - the primary ingredient is what most people call pot resin.
Smoking tobacco has the same risks as smoking marijuana. There are still plenty of the same carcinogens. You can still "get cancer" by smoking only pot just as easily as you can by smoking cigarettes. The average pot smoker doesn't even bother to filter (water doesn't count) which should actually make it more harmful. Worse, a lot of people choose to use aluminum as screens or even as pipes - burning aluminum has been linked to cancer and even early Alzheimer's Disease.
As HRD mentioned, driving under the influence does include marijuana. If you think that the intoxication of coffee is more dangerous than being stoned.... well, you must be stoned. You can find a ton of actual facts about the effects on motor skills, decision making and alertness pretty easily. You would be surprised - driving under the influence of THC actually appears worse than alcohol.
* I'm pretty sure it was Australia that stated that just last year someone died of an overdose of WoW and bong hits where the THC caused the victim to forget to breath. Don't ask me if that's even possible, but it is a recorded pot fatality.