The moral theory of the "just-war" or "limited-war" doctrine begins with the presumption which binds all Christians: We should do no harm to our neighbors. Just-war teaching has evolved as an effort to prevent war. Only if war cannot be rationally avoided does the teaching then seek to restrict and reduce its horrors. It does this by establishing a set of rigorous conditions which must be met if the decision to go to war is to be morally permissible. Such a decision, especially today, requires extraordinarily strong reasons for overriding the presumption in favor of peace and against war. The conditions for a just war are as follows:
Just cause. War is permissible only to confront "a real and certain danger," i.e., to protect innocent life, to preserve conditions necessary for decent human existence and to secure basic human rights.
Competent authority. War must be declared by those with responsibility for public order, not by private groups or individuals.
Comparative justice. In essence: Which side is sufficiently "right" in a dispute, and are the values at stake critical enough to override the presumption against war? Do the rights and values involved justify killing? Given techniques of propaganda and the ease with which nations and individuals either assume or delude themselves into believing that God or right is clearly on their side, the test of comparative justice may be extremely difficult to apply.
Right intention. War can be legitimately intended only for the reasons set forth above as a just cause.
Last resort. For resort to war to be justified, all peaceful alternatives must have been exhausted.
Probability of success. This is a difficult criterion to apply, but its purpose is to prevent irrational resort to force or hopeless resistance when the outcome of either will clearly be disproportionate or futile.
Proportionality. This means that the damage to be inflicted and the costs incurred by war must be proportionate to the good expected by taking up arms.
Linkback:
https://tubagbohol.mikeligalig.com/index.php?topic=73759.0