Are you sure this isn't the Eliezer concept of boring, instead of the human concept? There seem to be quite a few humans who are happy to keep winning using the same approach day after day year after year. They keep getting paid well, getting social status, money, sex, etc. To the extent they want novelty it is because such novelty is a sign of social status - a new car every year, a new girl every month, a promotion every two years, etc. It is not because they expect or want to learn something from it.

1) Because they'll say with their lips, "Oh, well, I just want the true essence" and then go on denying homosexuals the right to marry because it's the word of God.

2) What's left, exactly?

3) Nazism would have been unexceptional if it had been an ancient religion instead of a modern government. Why can't modern Nazis disavow ancient Nazi practice in favor of some true essence that makes sense in modern terms?

4) Why not start your search for the true essence in Lord of the Rings, which dominates the Bible both ethically and aesthetically? Or Harry Potter? Or Oh My Goddess?

And above all,

5) Because it's a fantastically elaborate way of refusing to admit you were wrong.

Lara Foster, consider the possibility that Obama's assassination would be a boon to progressivism, as JFK's death was.

Where is your evidence that JFK's death helped "progressivism"?

How do you know what would have happened to progressivism if JFK had died considerably later?

Isn't this an example of the fallacy we're talking about?

There is an argument from David Deutsch about the beauty of flowers. It is available here http://www.qubit.org/people/david/index.php?path=Video/Why%20Are%20Flowers%20Beautiful

Although I do not agree with everything he says in that talk. I think he may be right in that one reason both bees and humans find flowers attractive is that there was a huge genetic gap between bees and flowers, and so the shortest way of signaling between the species was to use a more universal standard, a standard that seems to be embedded in the very nature of intelligence(at least in part of mindspace) and therefore also appealing to human general intelligence, I think it has something to do with simplicity and complexity, minimal description length and symmetry and is definitively calibrated by the our laws of physics, cosmological constants, and environment on earth. Of course from an outside viewpoint this standard is not special or any more valuable that any other, but it may have a certain absolute quality to it that may appear in most intelligences at least i this universe, it may not be completely arbitrary, there may even be parts wich would evolve in any intelligence anywhere in the MUH.

A possibility that I have mentioned here before has to do with positive feedback loops in an isolated society between economic growth and luxury spending on moral coherence. On this account, people always had qualms about slavery but considered it to impractical to seriously consider abandoning it. When feeling rich they abandoned it anyway, either as conspicuous consumption or as luxury spending on simplicity. Having done so, it turned out, made them richer, affirming this sort of apparent luxury spending or conspicuous consumption as actually being moral progress. Viewing them as an ecosystem of godshatter, increased power destabilized the balance of power between dissonant utility functions, allowing certain elements to largely erase others while still further increasing in power. One problem with this story is that it passes some of the buck to economic growth, though only some, as access to resources and population are surely part of the answer there. Another problem is that it doesn't add up to normality, but proposed moralities should only add up to normality when approximated crudely, not when approximated precisely.

I don't think anyone can really argue that a large-scale decrease in global violence and violent death is a sign of moral progress. So I must point to this Steven Pinker conference where he lays out some statistics showing the gradual decline of violence and violent death throughout our history: http://www.ted.com/index.php/talks/steven_pinker_on_the_myth_of_violence.html