MacMillan is very smart. More important, she's very wise. That latter category informs all the thinking in this book and is what makes it well worth reading. (There's an oddly cranky review from earlier this month posted here. I don't understand it and can't square it with the book I read.)
The book tells us why the study of history is important. Part of the answer to that question is what history is - it's not just a table of names and dates: they are necessary, but not sufficient. Part is how history has been used and abused over time.
The learning in this book can be summarized in two phrases. The first is that you can't understand the news unless you understand the history. MacMillan shows this in her treatment of The Battle of Kosovo, which was a very different thing in 1389, when it happened and in 1989, when Serbian president Milosevic gave a speech marking the battle's 600th anniversary and began the process of unleashing the forces that would turn the former Yugoslavia into a slaughterhouse. The second, which is almost a corollary of the first, is her mention of the bewildering effect of living in the Soviet Union of the 1930s and 40s, where the rewriting of recent history of the revolution and its aftermath was an ongoing industry. She notes dryly that it can be disorienting to live in a country with an unpredictable past.
The book, between flanking chapters of the history craze and history as a guide, discusses the abuses of history as a source of comfort, as a property to be controlled, as a tool in shaping identity, as a catalyst of nationalism, and as a source of grievances (and we all know what kinds of actions unaddressed grievances can lead to in our modern world). She also addresses history as a battle in the culture wars going on almost everywhere.
As I read this book, it seemed to me to be more of an edited transcript of a lecture than something originally intended as a written work. Sure enough, the notes show that this is exactly what it is.
As a lecture, it is quite good. Wide-ranging, stimulating, articulate (MacMillan wrinkles her nose - rightly in my view - at historians who write [sometimes deliberately] in difficult prose), and clear-eyed. She spots the issues, nails the manipulators, and shows what's going on behind the curtain of the show.
As a book, it's way too short - about 170 pages - and therefore way too surfacy. Every time she focused in on a topic or an event, I was pleased, only to sigh as she skittered across the top of it to the next one. As an op-ed piece, or even a magazine article, this would have been fine, but in a book, I wanted more depth.
So this is a good, even an important, introduction to an issue that every educated person should view with concern. History, like all components of critical thinking, is vitally important, necessary even, for democratic government to work. The stories of history shape beliefs and the beliefs bring about and justify action.
Of course the people who most need to read and understand this book are the ones least likely to look at it. Ignorance usually protects itself with thick walls pierced by vigilantly guarded gates. The lobotomization of the populace of this and other countries by those who should be educating and informing them will doubtless continue as long as there is money to be made and power to be generated by the process. MacMillan and her like are fighting against a trend. It's important to all of us that they succeed.