Blind groper wrote:Historically, major disasters come from war, famine, or epidemic disease. Currently wars are getting smaller and less destructive. Famine has shrunk. Epidemic diseases tend to be controllable. Over the past 100 odd years, the death toll as a percentage of the whole population from any of these three has dropped, and dropped dramatically.
Frankly, Crumple, I think your predilection to predict disaster reflects a twist in your own personality - not anything happening in the real world.
I suspect quite a few civilizations were destroyed by natural long term changes in climate patterns. There are quite a few ancient ruins that were continuously inhabited for thousands of years that are now located in deserts. Of course it was fertile land when it was inhabited. Mayan civilization was virtually destroyed long before the Spanish by a long period of no rain, causing famines and societal collapse. I don't know if the population readjusted to a lower carrying capacity, or if good weather returned, but their civilization was never the same.