Book Short: Innovation and Discipline The Puritan Gift, by Kenneth and William Hopper, is a bit of a mixed bag. The authors have a wonderful point to make — that American businesses have thrived over the centuries due to a mix of innovation and discipline that descended from the country’s Puritan roots, and that when they lose their way, it’s because they diverge from those roots. The book is also an interesting, if somewhat cursory, history of American industry. And it playfully debunks some great myths of corporate American life over the last 50 years. But the book has a few too many moments where assertions aren’t supported by data — where its theories overreach into explanations of other aspects…