2016-07-27
  • Just Cause: Force may be used only to correct a grave and public evil, i.e., aggression or massive violation of the basic rights of whole populations.
  • Last Resort: All non-violent options must be exhausted before the use of force can be justified.
  • Legitimate Authority: A war is just only if it is declared by duly constituted public authorities. Even just causes cannot be served by actions taken by individuals or groups who do not constitute an authority sanctioned by whatever the society and outsiders to the society deem legitimate. possessing right intention, the use of arms must not produce evils and disorders graver than the evil to be eliminated. The power of modem means of destruction weighs very heavily in evaluating this condition.
  • A just war can only be fought to redress a wrong suffered. For example, self-defense against an armed attack is always considered to be a just cause (although the justice of the cause is not sufficient--see point #4). Further, a just war can only be fought with "right" intentions: the only permissible objective of a just war is to redress the injury.
  • A war can only be just if it is fought with a reasonable chance of success. Deaths and injury incurred in a hopeless cause are not morally justifiable.
  • The ultimate goal of a just war is to re-establish peace. More specifically, the peace established after the war must be preferable to the peace that would have prevailed if the war had not been fought.
  • The violence used in the war must be proportional to the injury suffered. States are prohibited from using force not necessary to attain the limited objective of addressing the injury suffered. the end being proportional to the means used.
  • The weapons used in war must discriminate between combatants and non-combatants. Civilians are never permissible targets of war, and every effort must be taken to avoid killing civilians. The deaths of civilians are justified only if they are unavoidable victims of a deliberate attack on a military target.
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