How great a burden can even an unrivaled superpower carry before it buckles and breaks? We may be about to find out.
Rome was the superpower of its time, ruling for centuries almost the entirety of what was then called the civilized world.
Great Britain was a superpower of its day, but she bled, bankrupted and broke herself in the Thirty Years War of the West from 1914-1945.
By Winston Churchill's death in 1965, the empire had vanished, and Britain was being invaded by a stream of migrants from its former colonies. ...