This is from Arthur Schopenhauer's Essay On Human Nature. His remarks and those of Voltaire, whom he quotes here, are applicable to every war zone in the world today.
'When the herbivorous animals had taken their place in the organic world, beasts of prey made their appearance--necessarily a late appearance--in each species, and proceeded to live upon them. Just in the same way, as soon as by honest toil and in the sweat of their faces men have won from the ground what is needed for the support of their societies, a number of individuals are sure to arise in some of these societies, who, instead of cultivating the earth and living on its produce, prefer to take their lives in their hands and risk health and freedom by falling upon those who are in possession of what they have honestly earned, and by appropriating the fruits of their labour. These are the beasts of prey in the human race; they are the conquering peoples whom we find everywhere in history, from the most ancient to the most recent times. Their varying fortunes, as at one moment they succeed and at another fail, make up the general elements of the history of the world. Hence Voltaire was perfectly right when he said that the aim of all war is robbery. That those who engage in it are ashamed of their doings is clear by the fact that governments loudly protest their reluctance to appeal to arms except for purposes of self-defence. Instead of trying to excuse themselves by telling public and official lies, which are almost more revolting than war itself, they should take their stand, as bold as brass, on Macchiavelli's doctrine. The gist of it may be stated to be this: that whereas between one individual and another, and so far as concerns the law and morality of their relations, the principle, _Don't do to others what you wouldn't like done to yourself_, certainly applies, it is the converse of this principle which is appropriate in the case of nations and in politics: _What you wouldn't like done to yourself do to others_. If you do not want to be put under a foreign yoke, take time by the forelock, and put your neighbour under it himself; whenever, that is to say, his weakness offers you the opportunity. For if you let the opportunity pass, it will desert one day to the enemy's camp and offer itself there. Then your enemy will put you under his yoke; and your failure to grasp the opportunity may be paid for, not by the generation which was guilty of it, but by the next. This Macchiavellian principle is always a much more decent cloak for the lust of robbery than the rags of very obvious lies in a speech from the head of the State; lies, too, of a description which recalls the well-known story of the rabbit attacking the dog. Every State looks upon its neighbours as at bottom a horde of robbers, who will fall upon it as soon as they have the opportunity.'
