An excerpt from Bertrand Russell's 1950 Nobel lecture:
"Interwoven with many other political motives are two closely related passions to which human beings are regrettably prone: I mean fear and hate. It is normal to hate what we fear, and it happens frequently, though not always, that we fear what we hate. I think it may be taken as the rule among primitive men, that they both fear and hate whatever is unfamiliar. They have their own herd, originally a very small one. And within one herd, all are friends, unless there is some special ground of enmity. Other herds are potential or actual enemies; a single member of one of them who strays by accident will be killed. An alien herd as a whole will be avoided or fought according to circumstances. It is this primitive mechanism which still controls our instinctive reaction to foreign nations. The completely untravelled person will view all foreigners as the savage regards a member of another herd. But the man who has travelled, or who has studied international politics, will have discovered that, if his herd is to prosper, it must, to some degree, become amalgamated with other herds. If you are English and someone says to you, «The French are your brothers», your first instinctive feeling will be, «Nonsense. They shrug their shoulders, and talk French. And I am even told that they eat frogs.» If he explains to you that we may have to fight the Russians, that, if so, it will be desirable to defend the line of the Rhine, and that, if the line of the Rhine is to be defended, the help of the French is essential, you will begin to see what he means when he says that the French are your brothers. But if some fellow-traveller were to go on to say that the Russians also are your brothers, he would be unable to persuade you, unless he could show that we are in danger from the Martians. We love those who hate our enemies, and if we had no enemies there would be very few people whom we should love."
Image: Photo of Bertrand Russell/Wikimedia