... The rest of the world though? Maybe not caves, but tents or whatever. All the stone-built, permanent settlements you can come up with still leave enough room. I think it might as well be that stark contrast leading to domination (pun intended) rather than war between those cities that's suspect.
I was wondering about Europe specifically, so thanks for the links.
https://en.wikipedia.org/wiki/Cucuteni%E2%80%93Trypillia_cul...
Talianki, 4000 BC.
https://en.wikipedia.org/wiki/Cucuteni%E2%80%93Trypillia_cul...