 several times in the book around the idea that we need to learn from history, and we really do need to learn from it and do things differently. But Dave, as you wrote in your book, I was wondering if you could explain for us the four factors that should be used to ascertain, and I think earlier you alluded to it, whether a country should be called a superpower. And I was wondering, how does the rise of this phenomenon called near-peer competitors factor into this assessment?