I dedicate this book to Mr Evans, a wonderful man who helped many of us of us to learn about the depths of history over which we float. It is important that we know where we come from, because if you do not know where you come from, then you don’t know where you are, and if you don’t know where you are, then you don’t know where you’re going. And if you don’t know where you’re going, you’re probably going wrong.
Terry Pratchett, al final de “I Shall Wear Midnight”.