348 HABIT AND INTELLIGENCE. [cHAP. 



old ones, but sufficiently different either not to mix with 

 others, or to preserve their distinctness (like the Ancon 

 sheep) in spite of intercrossing. 



How far I It may, perhaps, be asked whether I am after all a 

 agree with follower of Darwin or not. This question cannot be 



Darwm. ^ 



answered by a mere yes or no. 



I agree with the theory of which Darwin is not the 

 founder but the best known and most original exponent, 

 that all organic species have been descended from one or 

 a few germs. 



I believe that Darwin has done most important service 

 to science by pointing out the importance of natural 

 selection among spontaneous variations, as a cause of 

 organic progress. But I do not agree with him that it is 

 almost the only cause. 



I believe that geological time is too short to admit of 

 the progress that has taken place, unless variation is a 

 much more rapid process than Darwin admits. 



I believe (as stated in the preceding chapter) that the 

 facts of variability being greatest in the lowest organisms, 

 while progress has been most rapid among the higher ones, 

 shows that there is something in organic progress which 

 mere natural selection among spontaneous variations will 

 not account for. 



Finally, I believe this something is that Organizing 

 Intelligence which guides the action of the inorganic 

 forces, and forms structures which neither natural selec- 

 tion nor any other unintelligent agency could form. 



