I did say I'd shut up, didn't I? I will now shut up.

[Projoy] Actually, I'm agnostic about what it is. It might be that, and it might not be.

[Raak] You're right in a literal sense that "commands" are for those who need to be told what to do, but the point I was trying to make is that morality, if it is real, is normative. That is, it carries an implicit command in itself, irrespective of whether anyone is standing there articulating it. If it is true that there are people with moral insight who can "see" these truths, then they would also be able to "see" this implicit command and respond to it one way or the other (would you, incidentally, accept the existence of people with moral insight who nevertheless act wrongly?). Enlightened prudence (and yes, it's the "Nic Eth" I was thinking of, but any other kind too) doesn't cover it. When people say "Murder is wrong" they don't mean that it's in your interest (or even in the general interest) not to murder people - they mean that it's wrong, that you shouldn't do it, not even in an extraordinary case where it's beneficial. That's what Crime and Punishment is about. I haven't seen any argument explaining why, in the example given before, a soldier should sacrifice himself for his friends. I haven't even seen an argument explaining why I should not murder. I can imagine an argument setting out the undesirable effects of my murdering, but that's not the same thing. Jesus said "Seek first the kingdom of God and his righteousness, and all these other things will be given to you" - but he meant that happiness comes as a result of doing what's right, that is, as a reward. He didn't mean that happines literally is doing right, and I wouldn't have thought many people would either. Purely from an empirical standpoint, how many people would agree that the happiest people in world are also the most moral?
[Darren] The guilt point is a good one, but you'd have to argue that the guilt of doing something you believe to be bad would always outweigh any happiness you derived from the benefits of the bad act, which I think would be unlikely - people generally rationalise such things eventually. Plus, of course, it's no use when trying to make an objective account of morality, as you point out, because different people feel guilty about different things.
A shame Projoy's bowing out as I think he's been entirely right throughout this. But like him I'm not sure that much headway is being made in any direction, so perhaps I'll do the same!

[Bm] In which case, perhaps it's time to draw the whole question of "what is morality" to a close.

[Bm] Here's a thought: if immoral actions are those which we feel guilty about, then perhaps as guilt wears off the actions become less immoral! Has anyone ever claimed that a given action is (im)moral for perpetuity, or is it allowed for its status to change with time? Note that I'm not putting this idea of transient immorality forward as anything too serious, I'm just playing around with the concept to see what happens.

After all, most people would say (I think) that once you've done a particular immoral action once or twice, it becomes easier to do it later. I'm talking here about personal morality rather than any kind of universal morality, of course.

[Bm] "Command", "normative force", and "should" are just different labels for the same thing, whatever that thing is, if it exists. You can't get an ought from an is, so there are no arguments proving that one should do this or that, except from assumptions about what one should or should not do. There isn't an argument proving that you should get out of the way of a car either, only a description of the consequences, on the basis of which everyone is free to make their own response to the situation. "Enlightened prudence" (with an emphasis on the enlightened) doesn't bridge that gap, but neither does anything else. The only way to get there is to be there.

[Raak] Well, that is precisely one of the key reasons for supposing there is no such thing as objective moral truth!

Some people don't seem to have quite got the hang of this, you could say.