Agnostic Mom has an interesting article on how morality and ethics is likely a bio-neurological construct found in our brains as a result of evolutionary development:
Much Of Our Morality Lies In The Brain
Update: They discuss this neurological connection of emotion to moral decisions, and the fact that brain damage affects morality in the latest episode of the Skeptic’s Guide to the Universe.
Also, a reminder about religious belief also being neurological: Godhead: God in the Head.
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