Well the variance on it is definitely huge by human timespan standards, but I think it's not entirely unlikely that most humans that have ever lived will live b

Well the variance on it is definitely huge by human timespan standards, but I think it's not entirely unlikely that most humans that have ever lived will live between something like 1700-2200 AD. Could be 1700-3500 as well if we're lucky. It's also entirely possible that ancient Greeks had a discussion like this and decided that they'll all be dead soon, and couldn't have been more wrong, so the error bars are obviously massive when dealing with only an arbitrary fraction of the distribution.