Evolution of Morality

Scientific American has a very interesting article on
the possible evolution of morality, based on some reflections by Darwin some 18 months after his ground breaking voyage on the Darwin, as well as more recent research by "Dutch-born psychologist, ethologist and primatologist Frans de Waal".

Personally, I believe that the ramifications of this line of thinking are much more significant to me as a Christian than those of the more traditional Creation vs. Evolution debate. At stake is the answer to the question, "In what way are humans made in the image of God, that animals are not?"

If, as Darwin postulates, morality is merely another characteristic that has, over time, been bred into human-kind then what is to stop other creatures having developed in the same way? Surely if it is a "natural advantage" for us then it would be for others as well?

On the other hand, if justice is a concept unique to man then surely that suggests that our species may have been "created apart", imprinted with the capacity for the very qualities ascribed to God - justice, mercy, love, sacrifice?