Bronze Age civilization seemed to collapse in a single, cataclysmic event. And the signs are there in today’s world:
Centralized bureaucratization of the societies; overspecialization within the total mercantile network such that a disruption anywhere must spread its effects like ripples everywhere else; vulnerable infrastructure, such as, in the modern instance, the electrical grid; unregulated, massive migrations of peoples; and the development of enmitous social factions within societies, in some cases massively immigration-driven.
The more you learn about history, the richer and more complex it gets. And our ancestors had more in common with us than we imagine.