Last night I was torn away from my summer reality TV watching schedule by a great show on PBS. It's provocative title "How Art Made the World" made me stop and listen. I happened to be catching it mid-season (episode 3 of 5). This episode was called "The Art of Persuasion" and taught me that Alexander the Great put his face on coins (the first to do so) to remind people who was in charge throughout his empire. This was one of the well-illustrated stories in the show. I invited you to tune in. PBS's site is full of great information about the program, local listings and a DVD of the series with and accompanying book.