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. 
Moral neuroscience
moral psychology