"Rivalry is a much stronger motive. Over and over again in Mohammedan history, dynasties have come to grief because the sons of a sultan by different mothers could not agree, and in the resulting civil war universal ruin resulted... The world would be a happier place than it is if acquisitiveness were always stronger than rivalry. But in fact, a great many men will cheerfully face impoverishment if they can thereby secure complete ruin for their rivals."
— Bertrand Russell, Nobel Prize of Literature, 1950