The most persistent sound which reverberates through man's history is the beating of war drums.
Wars are not fought for territory, but for words. Man's deadliest weapon is language. He is as susceptible to being hypnotized by slogans as he is to infectious diseases. And where there is an epidemic, the group-mind takes over.
War is a ritual, a deadly ritual, not the result of aggressive self-assertion, but of self-transcending identification. Without loyalty to tribe, church, flag or ideal, there would be no wars.
Some tribes [of monkeys] have taken to washing potatoes in the river before eating them, others have not. Sometimes migrating groups of potato-washers meet non-washers, and the two groups watch each other's strange behavior with apparent bewilderment. But unlike the inhabitants of Lilliput, who fought holy crusades over the question at which end to break the egg, the potato-washing monkeys do not go to war with the non-washers, because the poor creatures have no language which would enable them to declare washing a diving commandment and eating unwashed potatoes a deadly heresy.