
We need to stop thinking of the higher animals (and maybe plants) as a single species with a single genome as the unit on which natural selection operates.
We, along with all higher animals, are colonies of more-or-less cooperating species each of which has it's own evolutionary 'agenda' but each of which, like us, is inextricably bound up with the evolution of the colony as a whole. In effect, what is evolving is the colony with its distributed genome. This also has damaging implications for creationism and its dressed up little brother, intelligent (sic) design.