The presidency of George W. Bush has been widely regarded as having occasioned one of the most dramatic shifts in the history of American foreign policy. The US interventions in Afghanistan and Iraq, the declaration of a 'war on terrorism' and the enunciation of a 'Bush Doctrine' of unrivalled military power, 'regime change' for 'rogue states', and preventive and pre-emptive war together generated unprecedented divisions in the international community. In...