For reasons that are not clear to me, some religious people seem to think that the moral sense that we possess is evidence for god. In fact, some of them (such as Francis Collins in his book The Language of God) go so far as to claim that this is a really powerful argument for god. They point to the fact that there are quite a few moral impulses that seem to be universal and claim that this must mean that they were implanted in us by god.
This is a specious argument. In my series of posts on the biological basis for justice and altruism (part 1, part 2, part 3, and part 4), I discussed how our ideas of justice and our altruistic impulses can be traced to biological origins. What science is making abundantly clear is that the foundation of our moral senses also are evolutionary in origin and that culture builds on those basic biological impulses to create moral system of increasing generality.
Paul Bloom has studied this question by looking at what we can learn about the moral thinking of babies and in his article The Moral Life of Babies in the New York Times issue on May 5, 2010 writes:
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