Imagine at a date far in the future a group of gunmen, originally on enemies side track down a man involved with a past war.
The gunmen take the apartment of the man and before they have the chance to shoot gun shots from inside the walls ring out, instantly killing the gun men.
Reciprocity for long past wars has potential to be turned up, turning down reciprocity in advance, increasing realization that people are known as protected, might be used for a trap might not always be known.
Saving Lives in advance, Peace reinforced not always zero cost
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