Population Problems

American American Mercury appear average biological biologically determined birth control birth rate capacity celibacy census cent century chap cities civilization classes consequence contraceptive countries cultural death rate decade decline defective desire differences differential disease East North Central economic eugenic European excess existence fact factors family lines famine fecundity fertility genetic biology hereditary heredity human immigration increase in numbers individuals industrial infanticide inferior labor less limited living Malthus Malthusian marriage married means ment mental million native ability natural increase natural selection Negro nomic number of children offspring operate organization overpopulation percentage period persons physical popu POPULATION DENSITY population growth population number Population Problems population quality possible poverty practice present produce race racial rapid rates of increase relatively reproduction restricted result rural selective social society statistical status superior Sweden tion traits trend United urban various viduals welfare women