Bertrand Russell: It must be admitted, however, that there are certain dangers. Before long the population may actually diminish. This is already happening in the most intelligent sections of the most intelligent nations; government opposition to birth-control propaganda gives a biological advantage to stupidity, since it is chiefly stupid people who governments succeed in keeping in ignorance. Before long, birth-control may become nearly universal among the white races; it will then not deteriorate their quality, but only diminish their numbers, at a time when uncivilized races are still prolific and are preserved from a high death-rate by white science. This situation will lead to a tendency --- already shown by the French --- to employ more prolific races as mercenaries. Governments will oppose the teaching of birth-control among Africans, for fear of losing recruits. The result will be an immense numerical inferiority of the white races, leading probably to their extermination in a mutiny of mercenaries. https://wordsmith.social/protestation/quotes#quote9233