For more than a century, people have often thought that the conclusion to draw from Darwin's vision is that Homo sapiens, our species - and we're just animals too, we're just mammals - that there is nothing morally special about us. I myself don't think this follows at all from Darwin's vision, but it is certainly the received view in many quarters.
Daniel DennettWhereas religions may serve a benign purpose by letting many people feel comfortable with the level of morality they themselves can attain, no religion holds its member to the high standards of moral responsibility that the secular world of science and medicine does!
Daniel DennettThe problem is that no ethical system has ever achieved consensus. Ethical systems are completely unlike mathematics or science. This is a source of concern.
Daniel Dennett