The Next Million Years

acquired characters agriculture already ancestor-worship argument arise barbarism become believe biological Boyle's Law Brahmans century certainly chance chapter civilization consider countries course creeds deal degenerate difficulty discovery doubt dynamical systems earth educating effect energy eugenist example families favour future history genes geometrical progression golden age happen happiness heredity human nature human race hydrogen ice ages important increase inevitable insect civilizations large number law of large laws less limitation of populations living long run Malthus Malthusian threat man's mankind master breed Mendelian laws method million molecules motor-car natural selection nearly over-population past history perhaps period Plato possible prescription present principle probability procreative instinct produce prospect prosperity provinces qualities question reason regarded revolution scientific scientific revolution seems sense sexual instinct specialized species spontaneously starvation starving margin survival things thousand tion true wild animal