Darwin and His Critics: The Reception of Darwin's Theory of Evolution by the Scientific Community

accept according action admit animals appear argument Asa Gray become believe called causes characters common complete conclusion considered continuous course creation Darwin descendants difficulty direct discussion distinct doubt effect evidence evolution evolutionary theory example existence explanation facts force forms geological give given gradual hypothesis ideas important individual induction instance kind knowledge known laws less Letters limited living matter means method mind natural selection naturalists never objections observed operation organic origin Origin of Species particular perhaps period phenomena philosophers physical plants possible present principle probably produce proof proved question race reason reference regard relation remarks respect result scientific scientists seems sense special creation species structure successive supposed things thought tion true truth universal variation varieties whole