g PUBLICATION OF THE 'ORIGIN OF SPECIES.' [1859 



shall feel sure it is my fault, and not the theory's fault, and 

 this will certainly comfort me. With regard to the descent 

 of the great Kingdoms (as Vertebrata, Articulata, &c.) from 

 one parent, I have said in the conclusion, that mere analogy 

 makes me think it probable ; my arguments and facts are 

 sound in my judgment only for each separate kingdom. 



The forms which are beaten inheriting some inferiority in 

 common. I dare say I have not been guarded enough, but 

 might not the term inferiority include less perfect adapta- 

 tion to physical conditions ? 



My remarks apply not to single species, but to groups or 

 genera ; the species of most genera are adapted at least to 

 rather hotter, and rather less hot, to rather damper and dryer 

 climates ; and when the several species of a group are beaten 

 and exterminated by the several species of another group, it 

 will not, I think, generally be from each new species being 

 adapted to the climate, but from all the new species having 

 some common advantage in obtaining sustenance, or escaping 

 enemies. As groups are concerned, a fairer illustration than 

 negro and white in Liberia would be the almost certain future 

 extinction of the genus ourang by the genus man, not owing 

 to man being better fitted for the climate, but owing to the 

 inherited intellectual inferiority of the Ourang-genus to Man- 

 genus, by his intellect, inventing fire-arms and cutting down 

 forests. I believe from reasons given in my discussion, that 

 acclimatisation is readily effected under nature. It has taken 

 me so many years to disabuse my mind of the too great impor- 

 tance of climate its important influence being so conspicu- 

 ous, whilst that of a struggle between creature and creature 

 is so hidden that I am inclined to swear at the North Pole, 

 and, as Sydney Smith said, even to speak disrespectfully of 

 the Equator. I beg you often to reflect (I have found noth- 

 ing so instructive) on the case of thousands of plants in the 

 middle point of their respective ranges, and which, as we 

 positively know, can perfectly well withstand a little more 

 heat and cold, a little more damp and dry, but which in 

 the metropolis of their range do not exist in vast numbers, 



