Nothing actually 'wants' to evolve
If you already know something about evolution, you may find something slightly paradoxical […]. Can we reconcile the idea that copying errors are an essential prerequisite for evolution to occur, with the statement that natural selection favours high copying-fidelity? The answer is that although evolution may seem, in some vague sense, a 'good thing', especially since we are the product of it, nothing actually 'wants' to evolve. Evolution is something that happens, willy-nilly, in spite of all the efforts of the replicators (and nowadays of the genes) to prevent it happening.
from "The Selfish Gene"
Quoted on Thu Mar 12th, 2015