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A Social Problem for Immediate Attention
The Biological Setting
HI Retrospects and Criticisms on the Growth
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agriculture animal annual Australia average Belgium better biological birth-rate births cause census cent century China civilization colored comparatively conclusion countries crops cultivation death death-rate decreased diseases dysgenic economic effect efficiency England estimate eugenic Europe evolution fact families farm fecundity figures France future genetic Germany give greater growth heredity human race ical immigration important India individual industrial infant mortality instinct Italy Japan knowledge labor land less life-tables limited living Malthus Malthusian marriage matter means mental methods million acres mother mulattoes nation natural increase natural selection negro neo-Malthusianism nomic organs overpopulation period plants popu population possible present probably problem production progress proportion question racial rate of increase reason relatively reproduction result returns Russia saturation sex organs situation social square miles statistics things thousand tion to-day trend United various white race whole women