The doctrine that war is always a greater evil seems to imply a materialist ethic, a belief that death and pain are the greatest evils. But I do not think they are... All men die, and most men miserably. That two soldiers on opposite sides, each believing his own country to be in the right, each at the moment when his selfishness is most in abeyance and his will to sacrifice in the ascendant, should kill [each] other in plain battle seems to me by no means one of the most terrible things in this terrible world.
C.S. Lewis
christianity, war