Surely if knowledge is valuable it can never be good policy in a country far wealthier than Tuscany to allow a genius like Mr. Dalton's to be employed in the drudgery of elementary instruction.
There are two ways to extend a business. Take inventory of what you're good at and extend out from your skills. Or determine what your customers need and work backward even if it requires learning new skills. Kindle is an example of working backward.
