Does the United States have the right to defend itself by striking first, or must it wait until an attack is in progress? Is the Bush Doctrine of aggressive preventive action a justified and legal recourse against threats posed by terrorists and rogue states? Tackling one of the most controversial policy issues of the post-September 11 world, Michael Doyle argues that neither the Bush Doctrine nor customary international law is capable of adequately responding to the pressing security threats of our times. In Striking First, Doyle shows how the Bush Doctrine has consistently disregarded a vita.