Describing the changes of heart and mind that reordered the Middle East in the wake of the First World War, AlbertHourani, one of the great scholars of the modern Middle East,has written: "Wars are catalysts, bringing to consciousness feelings hitherto inarticulate and creating expectations of change." The Gulf War of early 1991 bears the signs of having been such a catalyst. Having proved its assertiveness and strength, and having led a wide-ranging coalition into battle,the United States has, since the war's end, embarked on an energetic diplomatic effort aimed at settling the long-standing...