There have been many studies done on the brains of psychopaths and criminals, which have found that their brains are structurally different from the brains of "normal" people. Similarly, I would imagine that the brains of very "good" people (think Mother Theresa) might also be structurally different from the brains of "normal" people.
With all the advancements in genetic engineering, it seems plausible that in the future we would be able to ensure that all humans are born with "good" brains instead of "bad" brains. This seems like an awesome outcome to me. We would all be do-gooders and we will all love each other... Awww... But I was wondering if there are any counter-arguments to this. Thanks!