“Nationalism consists essentially in collective self-glorification and in a conviction that it is right to pursue the interests of one’s own nation however they may conflict with those of others. It is rather odd that emphasis upon the merits of one’s own nation should be considered a virtue. What should we think of an individual who proclaimed: ‘I am morally and intellectually superior to all other individuals, and, because of this superiority, I have a right to ignore all interests except my own’? There are, no doubt, plenty of people who feel this way, but if they proclaim their feeling too openly, and act upon it too blatantly, they are thought ill of.”

— Bertrand Russell, Common Sense and Nuclear Warfare (1959), Part II. Nationalism, Ch. X: Some Necessary Changes in Outlook, p. 124