Civilization has never evolved past the ethics of tribalism and actually rules modern day man as it has all throughout the past. Across the world most of the teachings of morality in religion and philosophy revolve around the notion that self sacrifice for another is the highest good. Of course this isn't what good is at all. Instead, the good is how the individual can live in accordance with his nature as man. His happiness depends on this and if these conditions are not met, then, he will suffer. They aren't being met by the 'old' philosophies of tribalism and to prove my point just look around at the suffering and confusion that most people live in.
If you have become disillusioned by life and can discern that it is a result of what the people hold as good, I offer you a way out of your confusion and a way into your happiness.