What I meant when I called myself a nihilist was essentially that there was no such thing as an objective, mind-independent morality. Nothing more. I would still consider myself a nihilist in that sense (and I expect most on this site would), but I don't call myself that because it could cause confusion.
Can you explain how the statement 'A world in which everyone but me does not murder is preferable to a world in which everyone including me does not murder' is a misinterpretation of this quotation?
It isn't, although that doesn't mean I would necessarily murder in such a world.
EDIT: Well, my nihilism was also a justification for the belief that it's silly to care about morality, and in that sense at least I'm no longer a nihilist in the sense that I was. That was just one aspect of my 'my eccentricities make me superior, everyone else's eccentricities are silly' phase, which I think I moved beyond around the time I stopped being a teenager.
What I meant when I called myself a nihilist was essentially that there was no such thing as an objective, mind-independent morality. Nothing more. I would still consider myself a nihilist in that sense (and I expect most on this site would), but I don't call myself that because it could cause confusion.
I agree that morality is not in the quarks.
It isn't.
I have noticed that the term 'nihilism' has quite a few different connotations. I do not know that it is a coincidence. Reputedly, the most popular connotation, and in my opinion, the least well-defined, is existential nihilism, 'the philosophical theory that life has no intrinsic meaning or value.' I think that most LessWrong users would agree that there is no intrinsic meaning or value, but also that they would argue that there is a contingent meaning or value, and that the absence of such intrinsic meaning or value is no justification to be a generally insufferable person.
There is also the slightly similar but perhaps more well-defined moral nihilism; epistemological nihilism; and the not-unrelated fatalism.
Here, it goes without saying that each of these positions is wrong.