Also lets not forget the Dark Ages which followed from the collapse of the Roman Empire. Many years of no development on any fronts bar physical violence.
If our civilization were to hit a major bump in the road it will have a period of extreme violence. Look at the Balkans and Iraq or Syria for examples.
If our civilization were to hit a major bump in the road it will have a period of extreme violence. Look at the Balkans and Iraq or Syria for examples.