At the present day, civilized opinion is a curious mental mixture. The military instincts and ideals are as strong as ever, but they are confronted by reflective criticisms which sorely curb their ancient freedom. Innumerable writers are showing up the bestial side of military service. Pure loot and mastery seem no longer morally allowable motives, and pretexts must be found for attributing them solely to the enemy.

The Moral Equivalent of War (1906)