Just War Theory and the Russia-Ukraine War

This article deploys what has come to be known as revisionist just war theory to analyze the morality of action by both sides in the current Russia-Ukraine war. Among the conclusions of this analysis are: (i) that virtually all uses of force by the Russian military in Ukraine are impermissible; (ii) that Ukrainian forces are bound by moral constraints, such as the requirement of proportionality, which requires the most careful attention to risks of escalation to the use of nuclear weapons and which may make it impermissible for Ukraine to achieve all of its just goals, and (iii) that some Russian civilians are liable to some harms, so that the imposition of economic sanctions is permissible, though only if they have a sufficiently high probability of being effective.