I was afraid the grandparent comment would sound too adversarial. Let me explain myself. Many politically conservative Americans (particularly in the Religious Right) are fond of making claims similar to the question Wei Dai asks in the original post — they claim that understanding the way people work in a material universe makes empathy impossible, or something. But I've never heard a convincing argument for it; most of these people are substance dualists.
On the other hand, many politically liberal Americans (particularly New Age types) are fond of repeating headlines of articles they read in Discover magazine and then saying that there's no free will, no morality, no right or wrong, people are animals, etc. But as far as I can tell, they don't take these beliefs seriously — they continue to be as nice as everyone else, they help their friends move, they don't steal from stores (not a lot, anyways). They claim that morality is relative, and then make moral arguments without using the language of moral realism. The people from the previous paragraph say "Aha! These guys admit to being nihilists ungoverned by morality and with no respect for human dignity or the sanctity of human life!" But their fears are unsubstantiated, as far as I can tell.
In summary, both "sides" of the issue, outside of Less Wrong and similar havens, are insane. My own belief, so far, is that understanding the human mind is not dangerous. If that's not true, I want to know. And I can trust you to give me an argument that is worth thinking about.
My own belief, so far, is that understanding the human mind is not dangerous. If that's not true, I want to know. And I can trust you to give me an argument that is worth thinking about.
I think you just argued against that yourself -- liberal Americans saying there's no free will, no morality etc. They may not act on it, but they do say it -- they really claim to be nihilists ungoverned by morality and so on, and in some cases actively preach that. (Two examples, neither of which I can track down specific links for: (1) the story, mentioned on LW, of a ...
steven0461 (comment under "Preference For (Many) Future Worlds"):
Yvain (Behaviorism: Beware Anthropomorphizing Humans):
Eliezer (Sympathetic Minds):
So, what if, the more we understand something, the less we tend to anthropomorphize it, and the less we empathize/sympathize with it? See this post for some possible examples of this. Or consider Yvain's blue-minimizing robot. At first we might empathize or even sympathize with its apparent goal of minimizing blue, at least until we understand that it's just a dumb program. We still sympathize with the predicament of the human-level side module inside that robot, but maybe only until we can understand it as something besides a "human level intelligence"? Should we keep carrying forward behaviorism's program of de-anthropomorphizing humans, knowing that it might (or probably will) reduce our level of empathy/sympathy towards others?