In one sense things can only be equal if they are entirely different. Thus, for instance, people talk with a quite astonishing gravity about the inequality or equality of the sexes; as if there could possibly be any inequality between a lock and a key. Wherever there is no element of variety, wherever all the items literally have an identical aim, there is at once and of necessity inequality. A woman is only inferior to man in the matter of being not so manly; she is inferior in nothing else. Man is inferior to woman in so far as he is not a woman; there is no other reason. And the same applies in some degree to all genuine differences. It is a great mistake to suppose that love unites and unifies men. Love diversifies them, because love is directed towards individuality. The thing that really unites men and makes them like to each other is hatred. Thus, for instance, the more we love Germany the more pleased we shall be that Germany should be something different from ourselves, should keep her own ritual and conviviality and we ours. But the more we hate Germany the more we shall copy German guns and German fortifications in order to be armed against Germany. The more modern nations detest each other the more meekly they follow each other; for all competition is in its nature only a furious plagiarism. As competition means always similarity, it is equally true that similarity always means inequality. If everything is trying to be green, some things will be greener than others; but there is an immortal and indestructible equality between green and red.
— Charles Dickens (1906).