It would be instructive if one of the “all scientists are moronic fakes” crowd could speculate on what use or reason other than religion could have given rise to this monument. Are these the garden gnomes of the time? Just something to do with folk’s free time?
“It would be instructive if one of the all scientists are moronic fakes crowd could speculate on what use or reason other than religion could have given rise to this monument.”
Maybe their team won the Pre-history Bowl that year.
Necessary to the health of the tribe. You need to interact with other groups so you need a place where you are sure to meet them and a place that is under a "peace bond" if you will.
So you set it up in a way that people can see it from a long way off thus the tall standing stones. Each tribe sets up a pillar and carve it with pictures to show it was theirs.
They rebuilt as old tribes died out or were absorbed by other tribes and new tribes were formed.
If it was a religious site then there should have been housing for a permanent staff of priests and their families as religious sites need to be tended. Can't have the gods getting ticked because some wolf peed on the stone sacred to Og lord of the trouser snake.
Meeting and trading centers have no such requirements, when you are done you just go.