DIRECTIVE FACTORS IN EVOLUTION 



ness, with a spirit of adventure, with an endeavour after well-being 

 -it is impossible to exaggerate the facts, even if the verbal sugges- 

 tion is in our ignorance too metaphorical do trade with time and 

 have commerce with circumstance as genuine agents, sharing in 

 their own evolution. This should at least increase our sympathetic 

 admiration of the tactics of Animate Nature, though the strategy 

 remain obscure. 



Science has to do with description and formulation not with 

 interpretation. Thus the selectionist account of the evolution of 

 adaptations does not conflict with the general idea behind the old 

 ' argument from design '. 



