Nice one brother. When people say stuff like "it's human nature to pursue self-interest", even assuming that's true, it's very broad. Individuals have different standards for what satisfies them, so their self-interest can lead them in very different directions.

I have read that when a pregnant mother's cortisol levels are high, the baby will react by developing an angry, competitive "nature" or predisposition. The cortisol signals to the child that you've got to be tough in this world. So when a child is born and raised in a loving environment, that's when magic happens.