Nem tudom honnan veszed, hogy nem a fiatalok elzüllésétől halt ki volna a kultúra:
Babylonian culture endured for centuries under the Achaemenids and survived under the rule of the later Hellenic Macedonian and Seleucid Empires as well, with the rulers of these empires also being listed as Kings of Babylon in Babylonian king lists and civil documents. It was first under the rule of the Parthian Empire that Babylon was gradually abandoned as a major urban center and the old Akkadian culture truly disappeared.
...
It is likely that only a small number of scholars knew how to write Akkadian by the time of the Parthian kings and the old Babylonian temples became increasingly undermanned and underfunded as people were drawn to the new Mesopotamian capitals, such as Seleucia and Ctesiphon
https://en.wikipedia.org/wiki/Neo-Babylonian_Empire#Fall_of_Babylon