Timeline for Starting population to reach 1 billion people in a post apocalyptic scenario
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
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| Dec 16, 2022 at 21:11 | comment | added | Sonvar | This does assume best case scenario of pure growth rate, with access to mostly modern technologies, food production and medicine. I know many countries with high birth rates are not first world countries, but they have access to some industrial process to make medice posible. then there are violent conflicts, natural desasters and disease. Wild animal attacks would also have a more dramatic impact to the initial population growth than it would with todays population. i think a bit higher inital starting population would be needed. | |
| Dec 16, 2022 at 20:56 | history | edited | Nepene Nep | CC BY-SA 4.0 |
inbreeding counteraction
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| Dec 16, 2022 at 20:17 | comment | added | Justin Thyme the Second | As long as you are not concerned about the genetic homogenetic composition of the population. | |
| Dec 16, 2022 at 12:33 | comment | added | Nepene Nep | I added both your comments. | |
| Dec 16, 2022 at 12:33 | history | edited | Nepene Nep | CC BY-SA 4.0 |
added comments
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| Dec 16, 2022 at 11:42 | comment | added | Matthias | This problem goes a bit beyond simple math. 250-500 individuals are required to avoid incest and 2500-5000 are required to maintain evolutionary potential (phys.org/news/2018-03-populations-pair.html). | |
| Dec 16, 2022 at 11:22 | comment | added | Cadence | I think your math is off - you've calculated the result if a population started at 1 billion and decayed 3% per year, but that's slightly different than starting small and growing 3% per year. The total you want is 1,000,000,000 / 1.03^500 ~= 381. Still quite small, all things considered. | |
| Dec 16, 2022 at 10:46 | comment | added | JuimyTheHyena | That is surprisngly low, thank you very much for your answer | |
| Dec 16, 2022 at 10:20 | history | answered | Nepene Nep | CC BY-SA 4.0 |