This reflects a drastic lack of understanding of the history involved.
The "Babylonian civilization," really Mesopotamian civilization, was more or less continuous from 1800 BC to 1200 AD, when it was destroyed by the Mongols. Different cities were the center of that civilization over time, and different groups dominated it, but there was enormous continuity. You can actually go back much earlier, perhaps to 4000 BC, if you go back into Sumerian times.
This civilization never collapsed for 1500 years. It was dependent on massive irrigation works, which were often destroyed in wars. But the huge peasant population always rebuilt them.
Then the Mongols rolled thru and not only destroyed the irrigation works, they killed pretty much all the peasants. Nobody to rebuild.
What is now Iraq was a major center of civilization for at least 5000 years, but it has never really recovered from the Mongols.
Mongols? I thought it was the Medo-Persian empire that conquered Babylon.