In the East, all killing is sinful, but sin is viewed from a medicinal perspective, as an illness from which one must be healed. Since all war requires killing, all war is sinful, and, conversely, no war is just. On the other hand, in a fallen world, some wars are necessary--for self-defense, for the protection of innocent life, for the protection of the Church. The Eastern Churches decried war, recognized its inevitability. Rather than try to determine a priori which wars were just and which were not, they instead focused on healing those who fought in war.