@hue-man,
Justice is balance and fair
Revenge is unbalance and unfair
Justice is balance and fair because : all is equal
Revenge is unbalance because : making things equal has a disadvantage
just like you sell your soul to a demon in order to get what you want to get.
(they kill your wife, but you kill the killers, the side effect on killing the killers is that police haunts you which make things unfair)
in case of war, justice is given by FORCE or withdrawal, if a country attacks you, you can get justice by FORCE or if they give up and brings you back justice, if they continue, then just continue seeking justice, even it cause great destruction, you just getting in what you seeks to them, you just making things fair.
if you give more on what they give to you we can call it revenge, since it make things unfair