This is a PowerPoint slide lecture I gave last spring at Carrollwood Cultural Center. I have tried to make it into a DVD with very little success. It seems not to want to play on either computers or TVs. So much for my great conversion software. I found AuthorStream and decided to post it to my blog and see what happens. It seems like it works well. I had hoped to sell the DVD but have decided to ask people to donate whatever they like if they watch it. I won't know if you watch it and DON'T donate, so enjoy either way.