Feeding all humans

Tribal farming era, the world is huge unknown.
With continuous exploration, the ancients were horrified to find that this world, the sky is round, there are all kinds of miracles descending, and even super-sized giants of 10,000 feet in height, the figures of intelligent beasts mysteriously appeared, trampling on mountains and breaking the earth.
Hundreds of years later, in such a treacherous environment, people fought with the giants and finally established the favorable Sumerian civilization.
On that day, the wise giant suddenly came down completely, trampling on the whole mountain village and river, exterminating the country.
The land and the sky collapsed, the cities and towns collapsed.
Gods and goddesses descended and sinned against all beings?
"Sorry, you are just ants living in the orchard of my compound, the ground is full of them, and when I accidentally passed by, I trampled you to death."
The sand planting flow in my own compound, grazing the human race in the sand with each world.