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?).
I don't think you need to be much concerned. When it comes to the politics of individual LessWrong posters I genuinely prefer not to know, but overall as a demographic LessWrong is pretty "social democratic" in its political beliefs.
To quote Konkvistador's summary:
I think you can agree your fear is quote unfounded. Considering most of the Libertarians are probably left Libertarian and our very wide spread dislike for the religious right in the US, LessWrong if anything is likley to have a strong left wing bias.