Question number 6: Who Created the Death Notes?

Answer:
Blah dee blah, another "humans become Shinigami when they die". More "Shinigami exist to regulate the human population". This is actually a very poorly set up argument and I don't really follow, but the basic idea is that the Shinigami King is the only Shinigami who wasn't at one point a human, so he made the Death Notes (err, but after humans invented notebooks, after the human/Shinigami covenant dealio in the previous question?). He picks his Shinigami from humans who kill, because they can, err, regulate the human race population. Again, Death Notes exist to find humans who will kill with it and thus become Shinigami. I don't have much to say besides, blah. I'll believe that the Shinigami King might have been the one who created the Death Notes, possibly, but the author is basically saying that all Shinigami were once human murderers. This seems to contradict characters like Rem, who, though will kill humans to sustain their own lives, are compassionate and view murder as despicable.