Some of the reasons for the decline of Sumer include the reduction of agricultural production. There was a population decline during this time, weakening the power of the Sumerians.
The answer is that they just pooped
Find out what the reasons were and decided what were not the reasons.
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Crops in Sumer experienced reduced growth due to factors such as salinization of soil from irrigation, decreasing fertility from over-cultivation, and climate changes leading to periods of drought and insufficient water supply. These conditions contributed to agricultural decline in Sumer over time.
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Poachers hunting this endangered species has made the number of their population decline.
The decline Bad emperors Inflation with economy Mercenarie army Too big
black death (plague) and crusades
it had too manny cheattas
The answer is that they just pooped
just because i said.......................