The American invasion of Iraq has been a success - for the Kurds. Kurdistan is an invisible nation, and the Kurds the largest ethnic group on Earth without a homeland, comprising some 25 million moderate Sunni Muslims living in the area around the borders of Turkey, Iran, Iraq, and Syria. Through a history dating back to biblical times, they have endured persecution and betrayal, surviving only through stubborn compromise with greater powers. They have always desired their own state, and now, accidentally, the United States may have helped them take a huge step toward that goal. As Quil Lawrence relates in his fascinating and timely study of the Iraqi Kurds, while their ambition and determination grow apace, their future will be largely dependent on whether America values a budding democracy in the region, or decides to yet again sacrifice the Kurds in the name of political expediency. Either way, the Kurdish north may well prove to be the defining battleground in Iraq, as the...