It seems as if every other account of traditional or hunter-gatherer cultures I have been reading lately marvels at the amount of tobacco smoked by the groups/tribes. The Kitavans, Eskimos, and Hazda all fall into this category. On Richard Nikoley's site, he indicated that in the China Study (of all places) the data showed a HIGHLY significant negative correlation between home-made rolled cigarettes and cancer.
I used to be pretty interested in ethnobotany, and recall that tobacco was more than just a sacred plant for many Native American tribes...it was a cure-all.
In the interest of full disclosure...I do smoke. But only about one a day (not lying) and they are organic American Spirits. I've never noticed any negative impact, outside of wanting to have a cigarette. Conventional wisdom says cigarettes are the worst thing in the world we could do for are health, so paleo wisdom says...?
If cigarettes do indeed confer a benefit, why do they? Appetite suppressant? Stimulant? Some compound within the plant? The nicotene itself?