How did sumer lose power?

Sumer lost power due to a combination of internal strife and external pressures. Invasions by neighboring peoples, such as the Akkadians, weakened Sumer's city-states, while internal conflicts and competition for resources led to political fragmentation. Additionally, environmental factors, such as salinization of soil and changes in climate, negatively impacted agriculture, further destabilizing the region. Ultimately, these factors contributed to the decline of Sumerian dominance and the rise of other powers in Mesopotamia.