** I'm tempted to recommend reading The Selfish Gene by Richard Dawkins... he provides a good analytical look on the concept of human selfishness, but he's also an atrociously boring and tedious writer. Your call.
Part 1 - Borderline Dissociation
Part 2 - When Empathy is Beyond Me
Part 3 - Self-Destructive Empathy
Part 5 - Yes, Borderlines do feel Empathy