I realize this question is contrived, but I figure it might provoke some fun discussion, so here goes:
If you could push a button and have your brain modified to precisely remove a cognitive bias (and have no other unnecessary effects—most convenient possible world), which would you choose? Why?
What if you were choosing for the whole human race?
I'm not sure whether I would want the level of belief in the just world to increase. According to the same ever-so-reliable wikipedia article, belief in it is associated with belief in "blaming the victim" (e.g people blaming rape victims, or stigmatizing those with diseases, especially AIDS) which is clearly wrong most of the time. It's a comforting idea, and might in theory provoke more moral behavior if people apply it to themselves, but equality of opportunity must be achieved first otherwise it will just result in more irrational and unfair judgement about others.
The problem is it is hard to tell what amount of victim-blaming is objectively correct or incorrect. It is easy to construct the opposite, the unjust world fallacy, where what people do have totally no effect on their outcomes, they are pawns in the hands of Lady Luck. Then you need to determine where on this scale, from completely just to completely unjust, does a problem cluster lie and it is not straightforward.
In some cases, victim blaming is clearly wrong, in some other cases, failing to do that is clearly wrong, and there are a lot of cases in betwee... (read more)