text: The justification for self-defense is not "situation ethics". It is a proper weighting in consideration of competing rights, commencing with the first right - the right to life itself.
  
  It does not in Catholic teaching justify "Go buy a gun and shoot anyone who you feel is threatening you." or  "Start a war if you think you are being 'attacked' ."
  
  We have the right to life, and therefore the right to defend our life. Our spouse and children have rights to life, and we have a right and at times a duty to defend their lives.
  
  Situation ethics would attempt to value the various lives and in some kind of moral calculus, and conclude which lives and how many are expendable.