The Noahide Flood

[BrianSoddingBoru4]

But it’s worth noting that if you restrict yourself to birthrate concerns, then a small change in birth rate will have a huge impact on how fast an initial population will balloon to a billion people.

Assuming again average age of reproduction is 16 years and avaerage life expectancy is 32 years.   If each woman pop out exactly 2 offspring who goes on to reproduce, The total population will never increase.   If each woman pops out 2.1 offsprings, then you will hit just about 100 million people in 5000 years.    Increase it slightly more to 2.12 and you get 2 billion people in 5000 years.     Make it 2.2 and you will hit a billion in 4,200 years.   Make it 2.5 and you will get a billion in 1700 years.

If you can exclude all factors that limit population size and pick your parameters, you can get any number you like. If we lower the age of reproduction to 12, raise the life expectancy to 40, have each woman give birth to 16 viable offspring, ignore inbreeding, assume no plagues or devastating natural disasters, we can reach a trillion by the end of the century.

And if we follow the Yellow Brick Road, the Great and Powerful Oz will grant us our hearts’ desire.

Boru