I've been listening to the "fall of civilizations" podcast, it's rather go if you are interested I that topic, one of the main factors that played a part in the destruction in nearly every single civilisation was climate change, one could nearly come to the conclusion it is almost a cycle.
https://www.sciencealert.com/hidden-hunger-stones-reveal-drought-warnings-from-the-past/amp?fbclid=IwAR0NuUcI1DOicED5iLPbpXFDVpSHRH9m0q1_9HqTEn8Xkhx3o93BQxtUjGI
