Mesopotamia was located in Asia, specifically in what is now modern-day Iraq. The two rivers bordering Mesopotamia are the Tigris and Euphrates Rivers.
People moved to the foothills of the Zagros Mountains, but they struggled due to food shortages. From here, people moved to what became known as Sumer so they had more space to grow crops.
In Sumer, farms struggled due to the extreme flooding and drought seasons. To control the issue, they created irrigation systems and built levees. During the drought, they'd poke holes in the levees to water crops.
The canals got clogged with silt and villagers would work together to scoop water from one reservoir to another to make sure water levels stayed balanced. Cities and towns began to form due to how well the villages worked together.
As the cities grew larger, people started to fight over water. Some of these fights ended in bloodshed.
They developed the irrigation system to help them grow crops and provide all their citizens with water. They also developed a sense of society by creating cities and towns.