Independent guide · not the official website
How does one simulated life get calculated?
Several probability models are chained together. Every stage changes the pool of outcomes available at the next stage.
Birth and life tables
Countries are weighted by annual births or population, not equally. Sex probability begins near the global birth ratio. Lifespan uses life expectancy and child mortality to synthesize age-by-age risk rather than copying a complete official life table.
Income, events and death
Income follows a lognormal-style distribution shaped by purchasing power and inequality. Yearly events are filtered by age, region and personal state. Death risk starts with an age baseline and is modified by health, income, behavior, conflict and other conditions.
This independent guide is not affiliated with, endorsed by, or operated by 1 in 8 Billion. Updated 14 October 2026