I have tried to show in this book that historians are selling themselves short. We do not have to limit ourselves to the two hundred generations in which people have been writing documents. If we widen our perspective to encompass archaeology, genetics, and linguistics—the kinds of evidence that dominated my first few chapters—we get a whole lot more history. Enough, in fact, to take us back five hundred generations. From such a big chunk of time, I have argued, we really can extract some patterns; and now, like Seldon, I want to suggest that once we do this we really can use the past to foresee the future.