Peter Singer

"Sanctity of Life or Quality of Life"

Whatever the future holds, it is likely to prove impossible to restore in full the sanctity-of-life view. The philosophical foundations of this view have been knocked asunder. We can no longer base our ethics on the idea that human beings are a special form of creation made in the image of God, singled out from all other animals, and along possessing an immortal soul. Our better understanding of our own nature has bridged the gulf that was once thought to lie between ourselves and other species, so why should we believe that the mere fact that a being is a member of the species Homo Sapiens endows its life with some unique, almost infinite value?" p128-129.