While Orthodox Christianity lacks the historical tradition of just war theory to criticize war, it does have a theological resource it could draw upon to condemn Russia’s invasion of Ukraine: personhood.
Jus post bellum justice provides us with two criteria: holding aggressors responsible (punishment) and providing some form of restoration to victims (restitution). The reality of our time suggests a very limited justice.
Just war thinking is moral analysis of military action, not a framework for foreign policy. Acknowledging these limitations helps us to become better just war casuists, and it highlights the need for values-driven strategic thinking in the foreign policy sphere.