Unless of course the 'natural progression of things' is to evolve our 'natural instincts' into something better... Otherwise we may just revert to the 'law of the jungle' from whence we came...And therin lies the crutch to the argument. "Natural Instincts". Surely, if we are to accept that darwinistic evolution is true, then ignoring the natural progression of things is something that we do at great peril.