Its b have an amazing day
If this question is based on Billy Milligan story, than yes :) There were real examples, although just a few of them during the whole history, or maybe noone knew about such a syndrome earlier.
Make do with what you have. The Mesopotamians gave us a very valuable building material the brick. Having no locally available stone they used the plentiful supplies of mud and clay found on the banks of the Euphrates to make bricks.
There is also trade, exchange what you have for what you lack. In their case it was agricultural produce. This is how Babylon became a thriving and powerful city.
Finally when you finally become more powerful take the resources from your neighbours by force.
It’s A officers could size any good without court permission
The people of Mesopotamia had their diet mostly on wheat and bread, they also used irrigation to help them plant those things up.The water came from the Tigris and Euphrates Rivers and the place is hot or humid