Why think this premise should be true given the way that Max concieves of God? Well, if God exists, remember he is the best possible being – meaning he has those great-making properties to their maximal compossible degrees and no such properties to any lessor degree. Now, a WORLD composed entirely of the single best possible being existing alone for eternity would be a WORLD composed entirely of all those great-making properties to their maximal compossible degrees and no such properties to any lessor degree – Now, unless there is some source of unique Goodness – Goodness that exists outside of and fully independent of God then GodWorld must be the unique best possibe world. it is the richest and, quite literally , the godliest of all possible worlds and since no other world can compare, it is the unique best possible world .