This was a great book written in a very accessible manner. It was also interesting to see Egoscue take primitive humans as the model for how he thinks we should continue to live in the world; he seems to have anticipated the primal/paleo craze by around a decade at least. To me, his main message is that the human body was designed to be in motion, and if we do not give it the motion (and also kind of motion) it is designed for, our bodies may then become dysfunctional, meaning that our proper alignment (shoulders, knees, ankles in a straight line, etc.) becomes compromised. The result of this, eventually, is pain and a possible further restriction of motion. This book instructs the reader in a fairly simple self-diagnosis, then also gives him/her a series of exercises designed to counteract and eventually correct his/her condition.
Since I've just started the exercises, I have no idea whether or not my "upper torso rotation" will be more-or-less "fixed" by the end of three weeks (if I can stick with it that long), and since I didn't have any pain to begin with and still have none, I can't say anything as to the efficacy of the Egoscue Method. However, I like his attitude towards modern-day ailments such as carpal tunnel syndrome: if you weren't born with a birth defect or haven't had a traumatic injury that left your skeleton damaged somehow, there's no reason why you shouldn't be able to, say, use a computer. Our ancestors were doing much more than that, continuously, without problems. He contends that by using the keyboard in the proper way, and by correcting existing postural problems, the carpal tunnel will go away. It seems to be that in his view, surgery is almost always unnecessary.
Like I wrote before: I like the theory, but I have no idea how it plays out in practice. Hopefully I'll find out in the next few weeks.