HOWEVER - When society breaks down, killing for you will be a natural thing. Self protection.
I think even if society broke down, empathy would stop me from killing opportunistically.
I doubt if I would feel too horrible if I killed in self-defense, but even in that case I'd feel regret that the conflict had to end that way.
If somebody came at you with a knife, and there was no law and order, believe me, you'd kill them. There would only be two options: kill or be killed.
I would have no problem killing, at any time. I have an empathy switch. I can turn it on or off at will.
