Some will lose out.
Not very rational for those to adopt a losing strategy (from their point of view), is it? Especially since they shouldn't reason from a point of "I could be the king". They aren't, and they know that. No reason to ignore that information, unless they believe in some universal reincarnation or somesuch.
It is irrational for agents to sign up to anyhting which is not in their [added: current] interests
Yes. Which is why rational agents wouldn't just go and change/compromise their terminal values, or their ethical judgements (=no convergence).
what is to stop them converging on the correct theory of morality, which we also don't have?
Starting out with different interests. A strong clippy accommodating a weak beady wouldn't be in its best self-interest. It could just employ a version of morality which is based on some tweaked axioms, yielding different results.
There are possibly good reasons for us as a race to aspire to working together. There are none for a domineering Clippy to take our interests into account, yielding to any supposedly "correct" morality would strictly damage its own interests.
A few notes about the site mechanics
A few notes about the community
If English is not your first language, don't let that make you afraid to post or comment. You can get English help on Discussion- or Main-level posts by sending a PM to one of the following users (use the "send message" link on the upper right of their user page). Either put the text of the post in the PM, or just say that you'd like English help and you'll get a response with an email address.
* Normal_Anomaly
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A note for theists: you will find the Less Wrong community to be predominantly atheist, though not completely so, and most of us are genuinely respectful of religious people who keep the usual community norms. It's worth saying that we might think religion is off-topic in some places where you think it's on-topic, so be thoughtful about where and how you start explicitly talking about it; some of us are happy to talk about religion, some of us aren't interested. Bear in mind that many of us really, truly have given full consideration to theistic claims and found them to be false, so starting with the most common arguments is pretty likely just to annoy people. Anyhow, it's absolutely OK to mention that you're religious in your welcome post and to invite a discussion there.
A list of some posts that are pretty awesome
I recommend the major sequences to everybody, but I realize how daunting they look at first. So for purposes of immediate gratification, the following posts are particularly interesting/illuminating/provocative and don't require any previous reading:
More suggestions are welcome! Or just check out the top-rated posts from the history of Less Wrong. Most posts at +50 or more are well worth your time.
Welcome to Less Wrong, and we look forward to hearing from you throughout the site!
Note from orthonormal: MBlume and other contributors wrote the original version of this welcome post, and I've edited it a fair bit. If there's anything I should add or update on this post (especially broken links), please send me a private message—I may not notice a comment on the post. Finally, once this gets past 500 comments, anyone is welcome to copy and edit this intro to start the next welcome thread.