What made up the three main social group of sumerians?

1. The ensi: The ensi were the rulers of the Sumerian city-states. They were typically male, and they held their positions for life. The ensi were responsible for the city-state's military, religious, and economic affairs.

2. The umma: The umma were the upper class of Sumerian society. They included the wealthy landowners, merchants, and priests. The umma were typically well-educated and had a high standard of living.

3. The iruna: The iruna were the lower class of Sumerian society. They included the farmers, laborers, and slaves. The iruna were typically poor and had a low standard of living.