The Disapperance of Moral Knowledge is a masterpiece written by Dallas Willard (completed by three of his close philosophy associates) which eloquently describes how Western culture gave up on understanding morality. Bear in mind that Dallas was a world-class philosopher who wrestled with many of the most influential writings ever attempted on the nature of reality and our place in the world.
We include here a few relevant references from his works.
“… there is in fact no body of moral knowledge now operative in the instutions of knowledge in our culture. This is the outcome of the now centuries-long effort to develop a moral guide to life within the framework of human thought and experience alone, unassisted by revelation.”
— Dallas Willard, The Divine Conspiracy, 184