The social structure of Ur-Nammu

The dominant position is the slave owners from among the service and clan nobility, the priesthood and the community elite.
Mass ruin of free community members, recruiting them as farm laborers.
Numerical increase in the class of slaves, incl. at the expense of prisoners of war; brutal exploitation of state slaves (“pear”).
A wide bureaucratic apparatus. Developed system of supervision, control, accounting.
Often the enslavement of free community members for debts, the sale of daughters into slavery, temporary slavery.