imperial powers in decline are almost invariably in denial of the fact. That was the case with Britain from 1918 onwards and, to judge by the behaviour of the Bush administration – which singularly failed to read the runes, preferring to believe that the US was about to rule the world in a new American century when the country was actually in decline and on the eve of a world in which it would find its authority considerably diminished – the US may well make the same mistake, perhaps on a much grander scale.

