When I put all the population estimates into a spreadsheet the last time it came up, the number of person-years lived can be roughly divided into thirds, one th

When I put all the population estimates into a spreadsheet the last time it came up, the number of person-years lived can be roughly divided into thirds, one third from the dawn of anatomically modern humans to the beginning of agriculture, one third from the beginning of agriculture to 1600, and the remaining third from 1600 to today. By current estimates, well acquire an equal slice of lived experience between now and 2100.