Recently, the issue (or non-issue) of "objective morality" has been the rage in religious discussions, thanks largely to the highly overrated Wm. Lane Craig. He uses it as an alleged proof of God.
Personally, I believe there is no such thing, nor should there be.
Regardless, from where do morals come? Are they a function of our evolved minds, or do they exist alone, or are they dictated by the gods?
Plato had no reason to know about evolution. Although it was discussed in his time, it was merely a matter of speculation. It was innocent of systematic information. It took Darwin to examine data toward a systematic explanation.
From Wiki: The Euthyphro dilemma is found in Plato's dialogue Euthyphro, in which Socrates asks Euthyphro: "Is the pious (τὸ ὅσιον) loved by the gods because it is pious, or is it pious because it is loved by the gods?" The dilemma has had a major impact upon the philosophical theism of the monotheistic religions, but in a modified form: "Is what is morally good commanded by God because it is morally good, or is it morally good because it is commanded by God?
Plato has a good point. If morality exists alone, and God must adhere to it, there is no reason for God when it comes to morality. We can bypass God and search for the root morality. Nonesuch has been identified.
If God dictates morality, then morality is fluid, and subject to God's whim. He can change his mind, and morality, as he pleases. The difference in Old Testament and New Testament morality is just one example of this. It lays waste, however, to the notion of objective morality.
So, from where comes morality?
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