In the long run, global politics are bound to become increasingly uncongenial to the concentration of hegemonic power in the hands of a single state. Hence, America is not only the first, as well as the only, truly global superpower, but it is also likely to be the very last.
The Grand Chessboard: American Primacy And Its Geostrategic Imperatives (ed. Basic Books, 1998) - ISBN: 9780465027262