A great Harper's article on the relationship of authorship to creation.  Highlights:

"Any text that has infiltrated the common mind to the extent of Gone With the Wind or Lolita or Ulysses inexorably joins the language of culture. A map-turned-to-landscape, it has moved to a place beyond enclosure or control. The authors and their heirs should consider the subsequent parodies, refractions, quotations, and revisions an honor, or at least the price of a rare success." 

I've long thought that a reasonable plan.