By contrast, in cases like Murder a second type of justification obtains. The permission to kill Attacker cannot be explained by his right’s being overridden by the greater good, since killing him does not save more lives. Moreover, Attacker has no standing to complain about being harmed, nor a claim to compensation ex post (and he certainly does not have a permission to fight back.) Instead, the permission to kill Attacker is explained by his lack of a right not to be killed in the circumstances. This is known as a liability justification for harming.