How did Sumarian sity states loose power?

Sumerian city-states lost power primarily due to internal strife, including conflicts among rival city-states and social unrest. Additionally, environmental factors, such as soil salinization and drought, weakened agricultural productivity, leading to economic decline. The rise of external powers, particularly the Akkadians under Sargon, further contributed to their downfall as they conquered and unified the region, diminishing the autonomy of individual Sumerian city-states.