The age-old question weather or not non-believers in god, Atheists, can have an “absolute morality” is a question that is best answered by Richard Dawkins. Probably the world’s most famous scientists that is often in debates about atheism and a strong advocate of evolution. Not too long ago I posted something on how chimpanzes have a sense of emphathy, morality towards other chimps and that those traits could have evolved through natural selection and evolution. Check out that post on Chimp Empathy and Morality – Without Religion.