Aldous Huxley, on “the error of speaking about certain categories of persons as though they were mere embodied abstractions” (Words and Behavior):

Foreigners and those who disagree with us are not thought of as men and women like ourselves and our fellow-countrymen; they are thought of as representatives and, so to say, symbols of a class. In so far as they have any personality at all, it is the personality we mistakenly attribute to their class — a personality that is, by definition, intrinsically evil. We know that the harming or killing of men and women is wrong, and we are reluctant consciously to do what we know to be wrong. But when particular men and women are thought of merely as representatives of a class, which has previously been defined as evil and personified in the shape of a devil, then the reluctance to hurt or murder disappears. Brown, Jones and Robinson are no longer thought of as Brown, Jones and Robinson, but as heretics, gentiles, Yids, niggers, barbarians, Huns, communists, capitalists, fascists, liberals — whichever the case may be. When they have been called such names and assimilated to the accursed class to which the names apply, Brown, Jones and Robinson cease to be conceived as what they really are — human persons — and become for the users of this fatally inappropriate language mere vermin or, worse, demons whom it is right and proper to destroy as thoroughly and as painfully as possible. Wherever persons are present, questions of morality arise. Rulers of nations and leaders of parties find morality embarrassing. That is why they take such pains to depersonalize their opponents. All propaganda directed against an opposing group has but one aim: to substitute diabolical abstractions for concrete persons. The propagandist’s purpose is to make one set of people forget that certain other sets of people are human. By robbing them of their personality, he puts them outside the pale of moral obligation. Mere symbols can have no rights — particularly when that of which they are symbolical is, by definition, evil.

Politics can become moral only on one condition: that its problems shall be spoken of and thought about exclusively in terms of concrete reality; that is to say, of persons. To depersonify human beings and to personify abstractions are complementary errors which lead, by an inexorable logic, to war between nations and to idolatrous worship of the State, with consequent governmental oppression. All current political thought is a mixture, in varying proportions, between thought in terms of concrete realities and thought in terms of depersonified symbols and personified abstractions. In the democratic countries the problems of internal politics are thought about mainly in terms of concrete reality; those of external politics, mainly in terms of abstractions and symbols. In dictatorial countries the proportion of concrete to abstract and symbolic thought is lower than in democratic countries. Dictators talk little of persons, much of personified abstractions, such as the Nation, the State, the Party, and much of depersonified symbols, such as Yids, Bolshies, Capitalists. The stupidity of politicians who talk about a world of persons as though it were not a world of persons is due in the main to self-interest. In a fictitious world of symbols and personified abstractions, rulers find that they can rule more effectively, and the ruled, that they can gratify instincts which the conventions of good manners and the imperatives of morality demand that they should repress. To think correctly is the condition of behaving well. It is also in itself a moral act; those who would think correctly must resist considerable temptations.