Nothing lasts forever. Empires crumble. Republics become dictatorships. Great civilizations lapse into obscurity.
The United States is riding high now – probably the greatest power the world has ever seen. The question is – when and how will it end?
Will it eventually be absorbed into a world union?
Will a dominant China in the 23rd century reduce it to a supplier of grain and cheap labor?
Will it gradually conquer more and more of the world, become a true empire, then a dictatorship, then slide into decay and internal warfare?
Will it be made irrelevant in a future dominated by multinational corporations and their private armies?