Niall Ferguson is a professor of political and financial history who has written other well-received, albeit controversial, books. My feeling after reading this book was rather mixed.
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This, I think, is where things become more complicated than the book suggests. Did England found the Bank of England and establish the other institutions that allowed the United Kingdom to become the global hegemon in order to become a global hegemon? Or did Parliament and the Bank of England etc. arise to meet other needs, and prove far more useful than originally foreseen? I strongly believe the latter to be true: Britain, as an island nation, had no neighbors, and was an (after 1066) invasion-proof distance from France. These factors almost certainly allowed the United Kingdom to generate a merchant class far more influential than its counterparts on the continent, engage in more maritime trade, and devote less to military spending than did land-locked nations that faced war at any time. In time, this merchant class, and the practice of dividing risks and participating in syndicates to conduct foreign trade almost certainly led to the culture and institutions that led to the Bank of England. Of course, if the Bank of England and the like did not arise as much from conscious policy decisions as from circumstances, it would seem more expedient to focus on the circumstances that led to the BofE and Britain's broad and deep credit markets, rather than on arcane policy decisions.
The rest of the book is an exhaustively documented look at the relationship between the health of various states and various financial indicators, such as debt, the presence of the gold standard, unemployment and the like. Some of the ideas may be provocative to some, but are very well-founded, and well worth reading, others less so. They are, however, not presented in a focused manner, and many of them are more advanced as "working hypotheses" than exhaustively proven. I believe that case studies examining multiple variables would have been more informative than attempts to reduce complex situations to a single variable.
Somewhat jarring is that some of the Ferguson's facts are wrong: in Chapter 12 he suggests that Switzerland succumbed to the Nazi tide, three pages later we learn that the opposite happened. To emphasize the importance of bullion he goes into the details of the movie based on Ian Fleming's "Goldfinger," but gets them wrong: the idea was not to sneak off with Fort Knox's gold - a logistical impossibility - but rather to render it radioactive and hence untradeable. At least one somewhat complicated book that Ferguson endorses is so flawed that its own author has repudiated it; this shouldn't happen in a polemic whose credibility is based on the author's ability to get his facts straight.
To sum up, parts of this book are quite interesting and stimulating, other parts less so. Having read this book, I personally would not choose to read it again.