> Extropianism has never claimed or sought to be a complete philosophy. 
Why not?  Why settle for anything less?  
One of my heroes, whose name I won't mention here, said 
>  The aim of human evolution is to attain a mystical vision of the 
>  universe.  
I'm not sure "mystical" is the word I would use, but I agree that 
evolution does have a purpose, and his way of expressing it 
is the best I have seen.  I might amend it as follows:  The aim of 
human evolution is to attain a complete vision of the universe, in which 
all causal relations are manifest, down to the roots of causality.  
Lyle