By most accounts, the career of the Selective Service Act of 1917 before the Supreme Court of the United States was remarkably short. In January 1918, the Court dispensed with constitutional challenges to the recently adopted military conscription law in a brief, unanimous opinion following a session of oral argument in which the justices were widely reported to be bored by the case and impatient to issue their ruling. But the Supreme Court's engagement with conscription and its enforcement marked a contingent and transformative moment for the Constitution, the Court, and the United States. The legacies of the Court's ruling in Arver v. United States include a surprising cast of characters: not only drafted soldiers and conscientious objectors, but a Hungarian refugee, a Canadian nurse, and an unwed teenage mother from rural Virginia. A century later, as Americans continue to grapple with the obligations of citizenship, the limits of federal power, and the extent of personal privacy, we might pause to consider a crucial moment when war brought the federal government into direct contact with the body and soul of every American citizen. 1