The beginning of the end of the US empire? Are we witnessing the beginning of the end of the American empire? The 20th century was the century of America’s rise to supremacy. Now, in spite of its present might, the US economy is showing all the signs of a future demise. It is no accident that just as the US economy begins to show its weakness, its emperors try to flex their muscles militarily. But the Empire looks as though it might be overstretching itself just when it seems that it is all-powerful.