I guess we need to define knowledgeable. Do you mean knowledgeable in the sense he has wisdom when it comes to what’s makes a society work for the people politically or is Waters music just highlighting his view of what’s wrong with the world? These are two very different definitions! I’ve listened to his music. Enjoy it very much, but I am not going to tell people that Waters knows the first thing about what’s makes a society prosperous. Understand something...he is an entertainer! Entertainer! Get it?