The Bible (LXX) dates the Babel event to the mid-third millennium BC, somewhere around 2500 BC
That was the heyday of pyramid building in Egypt (“Great Pyramid of Giza”), and ziggurat building in Iraq (“Tower of Babel”)
These massive building projects, especially in Iraq, contributed to the collapse of Sumerian society at the end of the 3rd millennium BC
Much as the Mayans deforested their lands to build fires to create plaster, the Sumerians plausibly deforested their lands to fire all the mudbricks for their ziggurats…
devastating their environment and pulling the rug out from under their own feet
Sumerian society collapsed, and was invaded by migrants from other areas (plausibly environmental refugees, from some sort of climate shock about 2200-2000 BC)
the unified Sumerian culture collapsed, and was replaced by a multi-ethnic & multi-lingual society
the Biblical memory of the event is accurate & informative, using one specific incident to (efficiently) recall the entire regional era