> So morality derives from our evolutionary biology, which
> just happens to have made us highly social primates who have
> strong emotional attachments to one another, but might have
> turned out some other way. In any case, it doesn't apply to
> the humans who happens to prefer to hate other humans on the
> basis, most likely, of other evolutionary accidents. There's
> no reason for them to be moral. Therefore, there is no general
> reason to be moral. The universe continues to lack a handle
> and a user's manual.
I think many moral philosophers would agree that morality is derived from the sort of creatures evolution has made us into. That's why lions have no ethical obligations. Morality is like color: it doesn't exist outside of our perceptions, except in the sense that certain external stimuli elicit extremely similar reactions in most people. As one wouldn't expect a color-blind person to view the color spectrum in the same manner as oneself, it should come as no surprise that the amoral among us fail to see the validity of the ethical arguments we find compelling.
-- Luke