Re:The real roots of early city states may rip up the textbooks
by Retric on Sunday October 15, 2017 @09:23AM
(#15477005)
For most of human history populations have been very low. ~10 million or fewer people worldwide before city states means land simply was not an issue. There was not enough people to clear and farm all the land for a long time.
The earth has 130 million square km of land. If ~10% makes good farm land that's 1km per person ~(247 acres) which is far to much to farm by hand.
PS: Currently 11% of land is under cultivation, much of that is only viable due to irrigation. But, we also use a lot of land for city's, suburbs, roads, etc that would have been great farm land.
The earth has 130 million square km of land. If ~10% makes good farm land that's 1km per person ~(247 acres) which is far to much to farm by hand.
PS: Currently 11% of land is under cultivation, much of that is only viable due to irrigation. But, we also use a lot of land for city's, suburbs, roads, etc that would have been great farm land.