Book excerpt: Renowned for his compassionate and balanced thinking on international affairs, Stanley Hoffmann reflects here on the proper place of the United States in a world it has defined almost exclusively by 9/11, the war on terrorism, and the invasion of Iraq. A true global citizen, Hoffmann's analysis is uniquely informed by his place as a public intellectual with one foot in Europe, the other in America. In this brilliant essay, he considers point by point the events and actions that have led America down the path of imperialism, becoming a power at once arrogant, victorious, and unilateral. Tracing the significance of September 11 in the short term and over the long course of American history, Hoffmann explains the contradictions and the consequences for international order--and disorder.