And he borrowed from Shakespeare: Ran was based heavily on King Lear, Throne of Blood on Macbeth, and maybe some others too. And Shakespeare borrowed from other

And he borrowed from Shakespeare: Ran was based heavily on King Lear, Throne of Blood on Macbeth, and maybe some others too. And Shakespeare borrowed from others. That's the way creativity in art (and science and technology) work; hardly anything is made from whole cloth. Is the concept behind our intellectual property system, that there is a single creator who owns the work, realistc?