
Cities usually had different social groups. Ur had three levels of society. At the top were the most powerful government officials, priests, and soldiers. The society's second level was made up of merchants, teachers, laborers, farmers, and craftsmen. At the bottom of the social scale were the slaves, who often had been captured during battle.
Typical god of Ur is a god of the moon which is called Sin or Nanna. He is commonly designated as En-zu, which means "lord of wisdom". During the period (c.2600-2400 BC) that Ur exercised a large measure of supremacy over the Euphrates valley, Sin was naturally regarded as the head of the pantheon.