The development of the earliest cities in Mesopotamia and the Middle East led to a substantial increase in violence between inhabitants. Laws, centralized administration, trade and culture then caused the ratio of violent deaths to fall back again in the Early and Middle Bronze Age (3,300 to 1,500 BCE). This is the conclusion of an international team of researchers from the Universities of Tübingen, Barcelona and Warsaw. Their results were published in Nature Human Behaviour.
Imagine living in a pod in a city crammed togther with a bunch of annoying stinky mfs and you are constantly bloated because you are eating a shitty diet that is mostly grain with no space to escape. I would also bonk some noggins.
WTF Did you just bonk my brothers noggin? Time to hand out some righteous noggin bonkin