If God does not exist, then the sociobiological account is true, and our moral beliefs are illusory. But, you see, that’s no reason to think that the sociobiological account is true. Indeed, if God exists, then it’s likely that He would want us to have fundamentally correct moral beliefs and so would either guide the evolutionary process to produce such beliefs or else instill them in us (Rom. 2:15). Apart from the assumption of atheism, we have no reason to deny what our moral experience tells us.
