Frank Herbert dreamed of the limits of human potental. And he was at his best when writing of it. This is another wonderful look into who we are and what we can be. Also dealing with many differing ethical problems, from cloning, status of slavery even to the choice of how we interact with the divine (an immensly powerful Ship is in orbit around the planet Pandora, has declared it's self God, and instructed the humans to decide on the best way how to WorShip it), and one of Frank Herberts most enduring themes: continuing human survival.