There are many studies done on how the brains of psychopaths and criminals are different from the brains of normal people. e.g. http://www.dailymail.co.uk/sciencetech/article-2273857/Neurologist-discovers-dark-patch-inside-brains-killers-rapists.html and http://bigthink.com/going-mental/the-neurobiology-of-evil
Has there been a study done on the brains of "good" people? For example all the Mother Theresa's in the world.
The reason I'm wondering this, is that if we can figure out what makes people "good" then we can make "good" GM babies in the future.