“There is no universal standard of morality other than self-interest.”
I see this assertion as a self-fulfilling prophecy. The more it becomes accepted that morality by definition is universally inclusive, the more pressure, both from within and from without, is placed upon local, autonomous codes of conduct. With enough pressure they disintegrate; and into the void comes somebody's vision of world order. But such a vision is ideal, a figment of the imagination. It has no more substance than the emperor's new clothes. What then is really governing the behavior of these people? Nothing in the final analysis but self-interest.
It is a common observation that we live in a selfish age. Is it ironic that the very belief in universally defined morality could have led to no other consequence?