Mass burial in plastered basin in the Outer Town at Titris Hoyuk. Image: Titris Hoyuk Photographic Archive
Pinpoints where this pernicious idea of Kingship entered the world.
"Çatalhöyük ( also Çatal Höyük ...) was a very large Neolithic and Chalcolithic settlement in southern Anatolia, which existed from approximately 7500 BCE to 5700 BCE ." - Wikipedia
So, despite the age of this site, people had already been living in towns in Anatolia for an enormously long time when this massacre happened, in fact for longer than the time from then to now.
I vote for Indo-European-speaking invaders. They didn’t expand from India to the Iberian peninsula by being nice.