Statistics on “how many humans have ever lived” are just a pet peeve of mine. How are you defining human? Does a Neanderthal count? What about Homo erectus? What about early Homo sapiens, which was anatomically modern but not behaviourally modern?
It’s easy to just say “well, biologists have decided what counts as a human by assigning things to Homo sapiens, and we trust biologists, so we’ll count Homo sapiens”, but if you’re actually using this stat to make some kind of point, like about how many meaningfully human deaths we have to mourn or how much contribution the average human made to the progress of history or what percentile of awesomeness you’re on if you include all humans to ever live, you need actual criteria based on sentience / technological competence / eligibility for awesomeness
So would you propose the -10K mark? Do it for each geographic area based on time-since-agriculture? Time-since-language?