You left out what I would have said is the most basic reason murder is illegal. Simple self interested cooperation. A wants to be free to kill his enemies but really doesn’t want his enemies to be free to kill him. B wants to be free to kill her enemies but doesn’t want her enemies to be free to kill her. C, D and E have similar preferences. By mutual agreement and alliance they each sacrifice their right to kill other people so that they are less vulnerable to be killed themselves.
Naturally they attempt to wrangle it such that they are an in group who does get to kill people anyway but in Australia at least we have managed to stamp even that sort of behaviour out entirely—at least within our own borders.
You left out what I would have said is the most basic reason murder is illegal. Simple self interested cooperation. A wants to be free to kill his enemies but really doesn’t want his enemies to be free to kill him. B wants to be free to kill her enemies but doesn’t want her enemies to be free to kill her. C, D and E have similar preferences. By mutual agreement and alliance they each sacrifice their right to kill other people so that they are less vulnerable to be killed themselves.
Naturally they attempt to wrangle it such that they are an in group who does get to kill people anyway but in Australia at least we have managed to stamp even that sort of behaviour out entirely—at least within our own borders.
Yeah, this is more or less what I meant by B, with the caveat that alice and bob may fundamentally disagree on who’s better off dead.