IANANR,IFIDSIWAPLATMDTTTOMC (I am not a neoreactionary, in fact I don't strongly identify with any political labels at the moment due to the threat of motivated cognition)
But,
I think I have grasped the link between LW and NRx. Its a mixture of having something to protect and extrapolating trends. Whereas singulatarians looks at exponential trends in computing, extrapolate and see a future where some form of superintelligence will surely come to dominate, worrying that human values could be destroyed, the NRx look at the trends of memes and genes, extrapolate the exponential growth, and see a future where their ingroup and values are massively outnumbered, which can be a death sentence in democracy.
If your terminal values are running against the tide of change, then progressivism is an existential risk. Imagine you believe in God if you do not, and then imagine Christianity going the same way as Norse paganism. Imagine everything you believe gives meaning to life being discarded to the dustbin of history. Or imagine that the positive correlation between religion and fertility reverses the secularisation of society in the long run, and we end up in a totalitarian theocracy. If somehow neither of these futures scares you, keep going until you imagine a future that does.
To put it another way, most people think "this group I disagree with is only 2% of the population. They're not a threat." NRx thinks "This group is only 2% and doubling every x years. Assuming the trend stays constant, how long do I have until they have a democratic majority?".
That sounded more positive of NRx than I intended. Conversely, while exit is not threatening, NRx taking over society is of course a big threat to anyone with progressive values.
Among the ways NRx differs, I think strategic prioritisation is one of the big points. Even if you believe that homosexuality is a big threat to civilisation (which I emphatically don't) well, there are a lot of homophobes. What is going to be the marginal benefit of one more homophobe? By comparison, one more cryonisist or one more FAI researcher has very large marginal benefit due to the small size of these groups. I find it really strange that Anissimov used to talk about the threat of nanotech/AI/bioterrorism and now talks about the threat of gays and transsexuals. [Edit: I retract this last snetence - apparently I have been misinformed about Anissimov]
Through LessWrong, I've discovered the no-reactionary movement. Servery says that there are some of you here.
I'm curious, what lead you to accept the basic premises of the movement? What is the story of your personal "conversion"? Was there some particular insight or information that was important in convincing you? Was it something that just "clicked" for you or that you had always felt in a vague way? Were any of you "raised in it"?
Feel free to forward my questions to others or direct me towards a better forum for asking this.
I hope that this is in no way demeaning or insulting. I'm genuinely curious and my questioning is value free. If you point me towards compelling evidence of the neo-reactionary premise, I'll update on it.