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If the Earth was edible, and was the sole source of food for its inhabitents, how long would it take for people to eat themselves off the planet?

Assuming a biblical creation story (a man and a woman), after how many years of humans dwelling on earth would the earth be eaten to the ground?

Assume the earth starts off looking the same as it does today, with the exception being that the land is edible food, and all ocean water is drinkable.

Assume that the volume of dirt one would require for a meal equals the volume of food normally consumed by humans in real life per meal.

Assume non-ration meals (3 full meals a day.)

Assume that the waste isn't edible and piles up.

Assume oxygen is provided through the soil.

Assume that the whole earth is edible (not just the crust.)

2100 - 2500 years

Assuming

• An individual consume 2000 grams of Earth each day


• A growing population rate of 4 childrens per family


• Lifespan of 100 years


• Three generations per century


• 5.97219 × 10^27 grams of available Earth to consume

The limit will be when poop is high enough that people cannot dig through it to get to food. They can dump poop into ocean or rivers, but that leads us to second limit:

They eat away dry land (till they can no longer dig from the bottom), so time to starvation depends on size of the continent you are on.

Technology could help dig deeper, or move to a different continent, but why would they develop technology if food is readily available?

If you do assume advanced technology, the sheer weight will make food below certain depth inedible. Here is a relevant link: https://what-if.xkcd.com/4/

PS I vote "earth be eaten to the ground" for quote of the day.

Edit: they can tunnel under the poop, going deeper and deeper until the poop collapses on them, or they get so deep that dirt is rock solid. Alternatively, they can launch poop into orbit (or off planet).