You've just reminded me that in sade mire book she talks about this cushitc idea of sacred kinship and it seems like pastoral ideaology is another piece of this cultural complex. There is also the fact that it seems everywhere we find megaliths in this region it's tied to cushites.I have no idea about that topic, to be honest.
But pastoralist ideology was a real thing in many different ways since the time of Nubia, in origin Egypt (in part) in quite surprising ways.
So we got
1) pastoral ideaology
2) sacred kinship
3) megaliths
I can't wait till there is enough archeological work that ties all these things to together.