My talk, given at the U. of Tulsa. Perhaps a bit too wide-ranging, but you decide. The main theme is trial-and-error learning, as opposed to central planning. It was supposed to be a house concert, but the host was afraid his place was too small, so we did it at the university. But if you want me to do a house concert in your town, and you think you can get an audience of 20 people or so, leave a comment.