This is an exceptionally well-conceived, thoughtful and important book. It's one of those rare books that I would recommend to basically everyone I know -- if I were a rich man, I'd buy them a copy.
Let me explain why I'm so excited by Broderick's work. Having grown up on SF, and being a generally open-minded person but also a mathematician/scientist with a strong rationalist and empiricist bent , I've never quite known what to make of psi. (Following Broderick, I'm using "psi" as an umbrella term for ESP, precognition, psychokinesis, and the familiar array of suspects...). Broderick's book is the first I've read that rationally, scientifically, even-handedly and maturely, reviews what it makes sense to think about psi given the available evidence.
(A quick word on my science background: I have a math PhD and although my main research areas are AI and cognitive science, I've also spent a lot of time working on empirical biological science as a data analyst. I was a professor for a 8 years but have been doing research in the software industry for the last decade.)
My basic attitude on psi has always been curious but ambivalent. One way to summarize it would be via the following three points....
First: Psi is NOT wildly scientifically implausible after the fashion of, say, perpetual motion machines built out of wheels and pulleys and spinning chambers filled with ball bearings. Science, at this point, understands the world only very approximately, and there is plenty of room in our current understanding of the physical universe for psi. Quantum theory's notions of nonlocality and resonance are (as many have observed) conceptually somewhat harmonious with some aspects of psi, but that's not the main point. The main point is that science does not rule out psi, in the sense that it rules out various sorts of obvious crackpottery.
Second: Anecdotal evidence for psi is so strong and so prevalent that it's hard to ignore. Yes, people can lie, and they can also be very good at fooling themselves. But the number of serious, self-reflective intelligent people to report various sorts of psi experiences is not something that should be glibly ignored.
Third: There is by now a long history of empirical laboratory work on psi, with results that are complex, perplexing, but in many ways so strongly statistically significant as to indicate that SOMETHING important is almost surely going on in these psi experiments...
Broderick, also being an open-minded rationalist/empiricist, seems to have started out his investigation of psi, as reported in his book, with the same basic intuition as I've described in the above three points. And he covers all three of these points in the book, but the main service he provides is to very carefully address my third point above: the scientific evidence.
His discussion of possible physical mechanisms of psi is competent but not all that complete or imaginative; and he wisely shies away from an extensive treatment of anecdotal evidence (this stuff has been discussed ad nauseum elsewhere). But his treatment of the scientific literature regarding psi is careful, masterful and compellingly presented. And this is no small achievement.
The scientific psi literature is large, complex, multifaceted and subtle -- and in spite of a lifelong peripheral fascination with psi, I have never taken the time to go through all that much of it myself. I'm too busy doing other sorts of scientific, mathematical and engineering work. Broderick has read the literature, sifted out the good from the bad, summarized the most important statistical and conceptual results, and presented his conclusions in ordinary English that anyone with a strong high school education should be able to understand.
His reviews of the work on remote viewing and precognition I found particularly fascinating, and convincing. It is hard to see how any fair-minded reader could come away from his treatments of these topics without at least a sharp pang of curiousity regarding what might actually be going on.
I put a few days effort into checking up his analyses by going back and reading some of the original papers he cited, and in every case I found his summaries completely accurate and impressively insightful.
What is my conclusion about psi after reading his book? Still not definitive -- and indeed, Broderick's own attitude as expressed in the book is not definitive.
I still can't feel absolutely certain whether psi is a real phenomenon; or whether, as an alternative explanation, the clearly statistically significant patterns observed across the body of psi experiments bespeak some deep oddities in the scientific method and the statistical paradigm that we don't currently understand.
But after reading his book, I am much more firmly convinced than before that psi phenomena are worthy of intensive, amply-funded scientific exploration. Psi should not be a fringe topic, it should be a core area of scientific investigation, up there with, say, unified physics, molecular biology, AI and so on and so forth.
Read the book for yourself, and if you're not hopelessly biased in your thinking, I suspect you'll come to a conclusion somewhat similar to mine.
As a bonus, as well as providing a profound intellectual and cultural service, the book is a lot of fun to read, due to Broderick's erudite literary writing style and ironic sense of humor.
My worry -- and I hope it doesn't eventuate -- is that the book is just too far ahead of its time. I wonder if the world is ready for a rational, scientific, even-handed treatment of psi phenomena.
Clearly, Broderick's book is too scientific and even-handed for die-hard psi believers; and too psi-friendly (although in a manner solidly based on the evidence) for the skeptical crowd. My hope is that it will find a market among those who are committed to really understanding the world, apart from the psychological pathologies of dogmatism or excessive skepticism. But, time will tell.
I note that Broderick has a history of being ahead of his time as a nonfiction writer. His 1997 book "The Spike" put forth basically the same ideas that Ray Kurzweil later promulgated in his 2005 book "The Singularity Is near." Kurzweil's book is a very good one, but so was Broderick's; yet Kurzweil's got copious media attention whereas Broderick's did not ... for multiple reasons, one of which, however, was simply timing. The world in 1997 wasn't ready to hear about the Singularity. The world in 2005 (or at least, a substantial part of it) was.
The question is: is the world in 2008 ready to absorb the complex, fascinating reality of psi research? If so, Broderick's book should strike a powerful chord. It certainly did for me.
