You're correct that 70-100 year lifespans are not novel. I think most of the improvement in life expectancy thus far comes from death reduction and very little,

You're correct that 70-100 year lifespans are not novel. I think most of the improvement in life expectancy thus far comes from death reduction and very little, if any, from retardation of aging. Stupidity is not "the biggest killer these days". People who avoid 1-3, 5-6, 9 (and possibly 4, 7, 8) on your list still die, just a decade or two later. Not everyone who gets, say, lung cancer was a smoker. Moreover, a lot of "injury" deaths are due to events like frail old people falling on their staircases and, because their bodies don't recover quickly, dying from their injuries and related complications; this can't really be classified as "stupidity". Age is obviously the ultimate cause of most deaths.