Today Borders filed for Chapter 11 bankruptcy protection. Everybody points the finger at Amazon when a brick-and-mortar book retailer has trouble. It seems to make sense to blame virtual stores when physical stores fail. I'm not sure whether it is electronic commerce or the electronic book that has brought the United States second largest bookseller to this point. Either way it makes me wonder about the consequences of new inventions. How many buggy makers went out of business when Henry Ford began producing the horseless carriage? How many employees will lose their jobs because Borders plans to close 30 percent of their store locations?