SELECTION 177 



evolutionist hope and aim not only for the life 

 of the individual, but increasingly for the 

 uplift of the race and of the community. On 

 the way towards this, selective consciousness 

 and conscience are indispensable, love as 

 individual, love as social ; and with these 

 sacrifice also, it may be of love or of parent- 

 hood itself. Nor is the social control a mere 

 choice between Draconian harshness on one 

 hand and shallow philanthropy on the other; 

 for these are but rival cruelties, that to the 

 individual, this to the race. To determine, 

 then, the ideal goal and the true process of 

 selection for our own species, is thus the 

 supreme problem and task which are opening 

 before us as evolutionists. 



AUXILIARY HYPOTHESIS OF ISOLATION. 

 We have already referred to the occurrence of 

 particular species on particular islands in the 

 Galapagos Archipelago, and there are a great 

 many similar cases which suggest that isola- 

 tion means something in evolution. The red 

 grouse is peculiar to Scotland, but it has 

 doubtless been derived from the closely-related 

 stock of the Scandinavian willow grouse. 

 While the zoologist has lately distinguished 

 an Orkney vole and a St. Kilda wren, every 

 one knows the Shetland pony, the Highland 

 cattle, There are said to be eighty species 



