It seems that your implicit question is, "If rationality makes people more effective at doing things that I don't value, >then should the ideas of rationality be spread?" That depends on how many people there are with values that are >inconsistent with yours, and it also depends on how much it makes people do things that you do value. And I would >contend that a world full of more rational people would still be a better world than this one even if it means that there >are a few sadists who are more effective for it. There are murderers who kill people with guns, and this is bad; but >there are many, many more soldiers who protect their nations with guns, and the existence of those nations allow >much higher standards of living than would be otherwise possible, and this is good. There are more good people >than evil people in the world. But it's also true that sometimes people can for the first time follow their beliefs to their >logical conclusions and, as a result, do things that very few people value.
Excellent answer! Yes, you deducted the implicit question right. I also agree that this is a rather abstract field of moral philosophy, though i did not see that at first. Although I don't think that your argument for the world being a better place with everyone being rational holds up, especially this point
There are more good people than evil people in the world.
Even if there are, there is no proof that after becoming "rational" they will not become "bad" (apostrophes because bad is not defined sufficiently, but that'll do.). I can imagine some interesting prospect for experiments in this field by the way. I also think that the result will vary if the subject is placed in society of only-rationalists vs usual society - with "bad" actions carried out more in the second example, as there is much less room for cooperation.
But of course that is pointless discussion, as the situation is not really based on reality in any way and we can't really tell what will happen. :)
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
* Randaly
* shokwave
* Barry Cotter
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!
Once a post gets over 500 comments, the site stops showing them all by default. If this post has 500 comments and you have 20 karma, please do start the next welcome post; a new post is a good perennial way to encourage newcomers and lurkers to introduce themselves. (Step-by-step, foolproof instructions here; takes <180seconds.)
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, a big thank you to everyone that helped write this post via its predecessors!