The danger of proliferation-of nuclear, biological, and chemical (NBC) weapons and missiles for their delivery-is appreciated by almost everyone. Since the 1970s, some of the most important instruments for combating this danger have been U.S. sanctions laws requiring penalties for acts contributing to proliferation. However, by the mid-1990s, a backlash had developed against a broad range of unilateral U.S. economic sanctions. This study examines...