Morality and Writing

Like the fig-leaf girdle of Genesis 3, Morality can be conceived as either a cover-up of sordid behavior, or an expression of human inventiveness.  Now, one undebateable characteristic that Morality for the most part shares with Genesis 3 is that it is a product of Writing.  Hence, it is a consequence of the evolutionary emergence of the uniquely versatile human thumb.  So, even if that characteristic does not establish conclusively that Morality is a useful invention, e. g. a means to a better organization of the species, it does explain why this species is apparently alone in having such a thing as 'Morality', regardless of its content or function, and, of course, likewise, a 'bible'.