I think it is where I first came upon the random walk challenge to allegedly "observed" moral progress. I do think I upgraded the argument even in that basic post, please tell me if you disagree.
Also I think Eliezer was basically working to rescue the notion of moral progress because that is what he sees as "adding back up to normality". I disagree, I think normality is the futility of preserving your values or their coherently extrapolated successors. Finding a way to make something like "moral progress" real or even preserve currently held values would be a massive project comparable in difficulty and perhaps even importance to developing FAI (which is one potential solution to this problem). I find it telling he dosen't seem directly touch on the subject afterwards.
I have found this most wonderful (if fairly lengthy) article, and thought you would enjoy having it brought to your attention.
It is so good, I think we should include it among the references in the "Politics is the Mind Killer" wiki page. But, before that, I submit it to you, and ask you: is there anything in this article that would warrant its exclusion from this site? I mean, besides the fact that it is about politics, and written by a notorious Social-democrat (And is that in itself grounds for exclusion?).