We believe a sacrifice has been made that has brought an end to the sacrifice of war.
Augustine and Luther thought Christians might go to war because they assumed a church existed that provided an alternative to the sacrificial system war always threatens to become. When Christians no longer believe that Christ’s sacrifice is sufficient for the salvation of the world, we will find other forms of sacrificial behaviours that are as compelling as they are idolatrous. In the process, Christians confuse the sacrifice of war with the sacrifice of Christ.
If a people does not exist that continually makes Christ present in the world, war will always threaten to become a sacrificial system. War is a counter church. War is the most determinative moral experience many people have.
That is why Christian realism requires the disavowal of war. Christians do not disavow war because it is often so horrible, but because war, in spite of its horror – or perhaps because it is so horrible – can be so morally compelling. That is why the church does not have an alternative to war. The church is the alternative to war. When Christians lose that reality – that is, the reality of the church as an alternative to the world’s reality – we abandon the world to the unreality of war.