What really happens is that the gene pool becomes filled with genes that influence bodies in such a way that they behave 'as if' they made complex, if unconscious, cost/benefit calculations
Richard DawkinsI remember at the age of six regaling my poor little sister with stories about the planets, and how far away they were and which ones might have life.
Richard DawkinsThere is no reason for believing that any sort of gods exist, and quite good reasons for believing that they do not exist and never have. It has all been a gigantic waste of time and a waste of life. It would be a joke of cosmic proportions if it weren't so tragic.
Richard DawkinsBut, however many ways there may be of being alive, it is certain that there are vastly more ways of being dead, or rather not alive.
Richard Dawkins