Unclear PhysicsMany authoritarian leaders want nuclear weapons, but few manage to acquire them. Autocrats seeking nuclear weapons fail in different ways and to varying degreesIraq almost managed it; Libya did not come close. In Unclear Physics, Mlfrid Braut Hegghammer compares the two failed nuclear weapons programs, showing that state capacity played a crucial role in the trajectory and outcomes of both projects. Braut Hegghammer draws on a rich set of new primary