Wiki lists Agression as a theory, but what about defense? In the town I live in some houses were mandatory to be built in just wood so they could be easily brunt down when they where under siege. It’s now heritage and there’s a street full of wooden houses here that tourists love (and actually so do I). It gave the aggressor no place to hide and shelter while the cannons from the city made light work of removing the threat. It’s called “vuurlinie huisjes”, or: line of fire houses. I guess it may have a double meaning: a line where all houses had to be burned as nothing could not be in the line of fire of the canons, under siege.

I guess if it was done as early as 6000 BC then canons are out of the question, but it could still be a quick way to deny an aggressor shelter? That would explain why there are no corpses found in the houses.