WHAT EVOLUTION IS 79 



eration and emphasized, evolution 

 seems to be a natural consequence. Is 

 not this precisely the method by which 

 plants and animals are moulded to 

 their surroundings; is not this, in 

 other words, the driving force that 

 lies behind evolution ? On the surface 

 it seems as though Lamarck's hy- 

 pothesis must indeed offer the true 

 explanation. 



