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As I write, highly civilized human beings are flying overhead trying to kill me. They do not feel any enmity against me as an individual, nor I against them. They are only doing their duty, as the saying goes. Most of them, I have no doubt, are kind-hearted law-abiding men who would never dream of committing murder in private life. On the other hand, if one of them succeeds in blowing me to pieces with a well-placed bomb, he will never sleep any worse for it. He is serving his country, which has the power to absolve him from evil.
-- George Orwell, London, 1941