Of all the empires in history, the United States will go down as one of the most aggressive and least inspiring. After nearly 160 years of warfare and imperial conquest, US policy, and the war machine it marshalled, has left nothing in its tracks but death and destruction, with no lasting cultural value. Five years after the US invasion, Iraq lies in ruins. Divided, violent, depleted, unstable, rife with sectarian war, a hotbed of terrorism and with 20 per cent of its population killed, wounded, displaced or in asylum in neighbouring countries, Iraq bears no resemblance to its recent past....