i think the idea of war should be viewed the same as civil disobedience. That it is done only as a last resort when talks fail. Following the ideas of John Rawls and Martin luther king jr for the reason of Civil disobedience [ which could be viewed as war[
If it must be done, it must be done fast and wiht little negative reaction as possible.
You must be facing a clear and substanial injustice.
lawful approaches have been tested and failed.
You must be willing to help others or support others action if they are doing something in the same vain.
It must be done for the good and not the bad reaction [ not to fight simply to kill others]
war can be justified, just people don't seem to think it though all the time.

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