In this article, I consider the permissibility of forming defensive alliances, which is a neglected topic in the contemporary literature on the ethics of war and peace. Drawing on the jus ad bellum criterion of proportionality in just war theory, I argue that if permissible defensive force requires that its expected harms must be counterbalanced by its expected goods, then, permissible defensive alliance formation seems to also require that its expected harms must be counterbalanced by its expected goods, as the (...) latter can result in much the same consequences as the former. Moreover, due to the incommensurability of values in play when making proportionality judgments, I argue for a value pluralist understanding of the criterion. On this view, defensive alliance formation is proportionate if the expected gains in certain values (goods) intuitively justify the expected losses in others (harms) when compared to the alternative expected value trade-offs of not allying. To explore the implications of my theoretical claims I consider them in relation to John Mearsheimer’s influential account of the causes of the Russo-Ukrainian War. On this account, the West’s strategy to assimilate Ukraine and Ukraine’s pursuit of NATO membership post-annexation of Crimea were disproportionate because the expected harms were unjustified when compared to the alternative expected goods and harms of forgoing Ukrainian membership of NATO. This does not imply that Russia’s aggression is just, but it does imply that the West and Ukraine are partially responsible for the war and that they acted impermissibly in attempting to expand/join NATO. (shrink)

The conventional view of Just War thinking holds that militaries operate under “special” moral rules in war. Conventional Just War thinking establishes a principled approach to such moral exceptionalism in order to prevent arbitrary or capricious uses of military force. It relies on the notion that soldiers are instruments of the state, which is a view that has been critiqued by the Revisionist movement. The Revisionist critique rightly puts greater emphasis on the moral agency of individual soldiers: they are not (...) mere instruments of the state. Although Revisionism has something particularly important to contribute when applied to cases that are short-of-war, where an individual agent’s moral culpability plays a greater role, soldiers fighting wars are not wholly autonomous moral agents. An Institutionalist approach that responds to Revisionist criticisms is a plausible alternative to the conventional Just War account for grounding the moral exceptionalism of war. For the Institutionalist, soldiers are moral agents with state-imposed obligations whose fundamental responsibility is the performance of the proper moral ends of the military institution they serve. If this is true, then soldiers have a moral obligation to be attentive to the moral corruption of the military institution of which they are a part. (shrink)

ABSTRACTThis article argues that there is a just cause for war to prevent the future hazards of anthropogenic climate change even if, because of what is known as the Non-Identity Problem, that caus...