The right to kill with impunity in war thus seems to be based upon a tacit structural premise: if one has the right to kill without crime, it is because that right is granted mutually. If I agree to confer upon another the right to kill me or my people with impunity, that is because I count on benefiting from the same exemption if I myself kill. The decriminalization of warrior homicide presupposes a structure of reciprocity. The killing is allowed only because it is a matter of killing each other.

Grégoire Chamayou, A Theory of the Drone, loc. 522