"The second impulse was not peculiar to the Japanese army. As the Turks had treated the Armenians, as Stalin's henchmen were treating the kulaks, Poles and other 'enemies of the people', as the Nazis were soon to start treating Jews, Gypsies and the mentally ill, so the Japanese now thought of and treated the Chinese: as sub-humans. This capacity to treat other human beings as members of an inferior and indeed malignant species - as mere vermin - was one of the crucial reasons why twentieth-century conflict was so violent. Only make this mental leap, and warfare ceases to be a formalized encounter between uniformed armies. It becomes a war of annihilation, in which everyone on the other side - men, women, children, the elderly - can legitimately be killed."