Nations, like individuals who live apart, mistake provincialism for perfection, and hatred of all other nations for patriotism. With most people, strangers are not only enemies, but inferiors. They imagine that they are progressive because they know little of others, and compare their present, not with the present of other nations, but with their own past.
Few people have imagination enough to sympathize with those of a different complexion, with those professing another religion or speaking another language, or even wearing garments unlike their own. Most people regard every difference between themselves and others as an evidence of the inferiority of the others. They have not intelligence enough to put themselves in the place of another if that other happens to be outwardly unlike themselves.