For the first time in my life, the cause of WWI makes sense to me. Prior to this, all I'd ever been taught was that the war was caused by the assassination an Austrian Archduke,some murky treaties and a generally hostile Germany. I remember thinking at the time that this was a little naive, but my history teachers were always eager to skip over WWI to proceed onward to WWII, so I allowed myself to be distracted.
However, when one reads this book, it becomes apparent that the the imperial ambitions of England, Russia, & France were threatened by a successful Germany. Consequently, they planned, through treaties, and documented military build-ups, to neutralize Germany at some point. That point came with the assassination which was fostered by the Russians and provided the excuse they needed to address Germany.
A bulleted outline of this book should be taught in history courses. It certainly helps to explain the German hatred of the Versailles treaty and Hitler's ability to stoke the German people's desire for revenge, which has heretofore been rather mysterious to me.