Jeff McMahan has argued against the moral equivalence of combatants (MEC) by developing a liability-based account of killing in warfare. On this account, a combatant is morally liable to be killed only if doing so is an effective means of reducing or eliminating an unjust threat to which that combatant is contributing. Since combatants fighting for a just cause generally do not contribute to unjust threats, they are not morally liable to be killed; thus MEC is mistaken. The problem, however, (...) is that many unjust combatants contribute very little to the war in which they participate—often no more than the typical civilian. Thus either the typical civilian is morally liable to be killed, or many unjust combatants are not morally liable to be killed. That is, the liability based account seems to force us to choose between a version of pacifism, and total war. Seth Lazar has called this “The Responsibility Dilemma”. But I will argue that we can salvage a liability-based account of war—one which rejects MEC—by grounding the moral liability of unjust combatants not only in their individual contributions but also in their complicit participation in that war. On this view, all enlistees, regardless of the degree to which they contribute to an unjust war, are complicitously liable to be killed if it is necessary to avert an unjust threat posed by their side. This collectivized liability based account I develop avoids the Responsibility Dilemma unlike individualized liability-based accounts of the sort developed by McMahan. (shrink)

Killing in War presents the Moral Equality of Combatants with serious, and in my view insurmountable problems. Absent some novel defense, this thesis is now very difficult to sustain. But this success is counterbalanced by the strikingly revisionist implications of McMahan’s account of the underlying morality of killing in war, which forces us into one of two unattractive positions, contingent pacifism, or near-total war. In this article, I have argued that his efforts to mitigate these controversial implications fail. The reader (...) is left stranded: to reach plausible conclusions, Walzer deployed an implausible conception of our rights to life; McMahan’s more rigorous account of those rights generates untenable conclusions. Absent new developments, it seems that the prospects for grounding the ethics of war in individual rights are poor: any theory of our rights to life that is sufficiently indiscriminate to work in the chaos of war is not discriminating enough to be a plausible theory of our rights to life. Perhaps by rejecting the ideal of the rights-respecting war altogether we might develop an alternative theory of justified warfare, which marries theoretical soundness with conclusions that we can more confidently support. (shrink)