How will our civilization end? One need only look around. Neither war nor natural disaster has destroyed a single city in our day (New Orleans, after all, still stands), yet cities and parts of cities across the nation lie in ruins: East St. Louis, Philadelphia, Newark, Cincinnati, Cleveland, and above all Detroit. No asteroid has fallen upon them, no artillery shelled them, yet there they lie in ruins.
What have these cities in common? Answer that question and you will answer also the question of how our civilization will end.
You will also find yourself banned from Free Republic. For even here, the truth dare not be spoken aloud.
Single-party Democratic rule for decades...
Just like Babylon went away because the rivers it lived off moved so too these American cities are collapsing with the loss of the things that got them built in those locations in the fist place.
Just like the west's mining cities (yes cities) vanished after their ore was depleted so to is Cleveland and Detroit vanishing as their reason for being also vanishes.