I'd be (somewhat) interested to dissect what these objective moral values are.
You'd have to look at mankind, throughout all of history and find values that never changed.
To suggest that there are objective morals or ethical facts is not to suggest that people have always adhered to them, just that they should have.
We evolved from animals.
Yet, morality differs species to species.
We don't judge animals for committing acts that would be immoral for a human.
If a dog eats a puppy, that is more disturbing than a rat eating a new-born pup.
So, at what point (of our evolution) did we shift to these human objective morals?
Around the point at which we developed the ability to use logic and reason. I don't expect non-human animals to consider the interests of other non-human animals, I don't think it is really within their capacity, outside the context of their immediate family/herd/etc.
Murder certainly hasn't been consistently seen as immoral, throughout all of human history.
Our sense of morality suits us. We created it to suit us.
I agree with you here, for the most part.
Of course morality suits us, moral principles are essentially guidelines on how to live without unjustly causing a negative impact on others. Actions can never be defined as morally good from a self-interested perspective, the whole point of morality is you have to be able to address a wider audience, or impartial observer, why your conduct was the right course of action in terms of the interests of everyone affected by that conduct.
Morality is not a scientific principle, it can't be measured by any sort of instrument. Morality is a set of selflessly rational principles. This is why one can never morally justify killing someone else for fun, or participating in a rape.
If an highly advanced alien race came to Earth, witnessed the horror, and eradicated the human race... would that be objectively immoral? It seems to me that there is a great deal of disagreement about what is and what isn't moral. Even seemingly basic things, like homosexuality and the unnecessary consumption of meat.
In regards to the alien question, I would suggest it would be immoral for them to eradicate life on earth. If they tried to justify it in terms of being in the interests of the creatures which inhabit earth, this would at least be an attempt at ethical justification, although my feeling is that no such explanation would suffice to excuse their conduct.
People disagree on all sorts of things, it does not mean there is not an objective fact of the matter. Many people used to believe the world was flat, the fact that some people thought it was flat and some people thought it was round does not lead one to the conclusion that the earth was neither flat nor round at the time of disagreement.
If anything, d_m, I think you need to explain why you don't think morality is subjective.
The people that disagree with you: are they wrong? That's what you're suggesting.
Yes, in my opinion, those who argue for moral relativism are wrong.
Are we confusing the "moral" with the "ethical" here?
"Morality" is a pretty shaky foundation to base belief systems upon, from my interpretation of the word.
I am more or less treating morals and ethics as the same thing, as I was taught to do in ethics class. Looking up their respective definitions on google yields virtually identical results, in that both commonly refer to principles which govern behaviour/define right and wrong.
I get that there is not a perfect crossover for the words, but in a certain respect they can definitely be used interchangeably. I feel that being on a philosophy forum, and in the context of discussing subjective morality as a justification for behaviour, I am correct to use the terms interchangeably in this instance.