I don't understand the argument for 'yes'. Please explain it to me.
I'll bite. I suppose the problem with saying there is no objective morality is that then all morality is subjective - for instance, one could take the subjective relativist position Foucaulf describes above. Well in that case, how do you say that murder, for instance, is
wrong? All you can say is you don't like murder, maybe you don't like it a lot, and you really don't want anyone to do it. But if someone else, for whatever reason, really wants to do it, why is their desire invalid, if it is of the same nature as your desire? Two desires of the same nature conflicting, neither is inherently better than the other.