The most sold book in the world, by a large margin, for a long long time, is The Bible. If genetic historians and biblical scholars succeed, perhaps someday the unknown decedents of the unknown authors and other known valid holders of IP rights, such as the decedents of Moses and brothers, sisters and cousins of Jesus, could one day be fairly compensated. But it would end up being everyone alive, so we should do that, fairly compensate all the IP holders for the unpaid use of all that IP, including all the movies and TV shows, and including all interest accrued across the centuries, and literally everyone will get rich off the proceeds of past, current and future Bible sales. Crazy idea, but it just might work.