Sexual selection acts in a less rigorous manner than natural selection. The latter produces its effects by the life or death at all ages of the more … - Charles Darwin

Animals whom we have made our slaves we do not like to consider our equals. — Do not slave holders wish to make the black man other kind? — animals with affections, imitation, fear of death, pain, sorrow for the dead. — respect.

He remarks that "considering their weakness and their size, the work they are represented to have accomplished is stupendous." Here we have an instance of that inability to sum up the effects of a continually recurrent cause, which has often retarded the progress of science, as formerly in the case of geology, and more recently in that of the principle of evolution.

Only picture to yourself a nice soft wife on a sofa with good fire, & books & music.