The Noahide Flood

[Anomalocaris]

If you ignore effects of things like limits of ecological carrying capacity, plagues, hereditary diseases made worse by incest, and other mass culling influences, then the reproductive rate required to start with a tiny founder population and fill the earth with writhing humans within a few thousand years is amazingly low, given any reasonable estimate of reproductive age.    If you assume generation gap is 16 years and average life expectancy is 32 years (true for most of human history), then each woman only need to pop out an average of between 2.1 and 2.2 offsprings who go on to reproduce to get you to population of billions of people within 5000 years.

Even with all the limits of ecological carrying capacity, plagues, hereditary diseases made worse by incest, and human sacrifice and other culling influences competing to kill them off,  the native Americans still went from a founder population of at most a few hundred people about 13000 years ago to over 100 million people just before Europeans showed up and killed 95% of them with mostly plague.

(Bold mine)

Isn't ignoring those things kinda, well, stupid? It seems like you would have to take them into account in order for a population prediction to have any validity whatsoever.

I mean, when you included them for the Native Americans, it took 13k years to get to 100 million population. If you include them for the Noahic group, there's no way to get to ~8 billion in 5000 years.

Boru

Realistic ecological carrying capacity concerns will by itself sink any scenario of repopulating the earth after Noachian flood.

 the amount of violent turbulent water flow required to drown the world in 8km of water in 150 days and then drain it away all in  221 days would strip all the drowned land of all soil down to bedrock and more,  the flow rate and turbulence is going to be particularly great in the low lying areas where all the fertile agricultural soil are,   I don’t think the earth would have significant ecological carrying capacity on land to speak off in the aftermath to support any significant human population recovery.     it would take tens to hundreds of thousands of years of weathering, erosion and deposition to restore soil fertility and ecological carrying capacity.