There seem to be alot of people in this thread that are all too willing to jump on the “guy’s a crank” bandwagon. Wolfram is most assuredly NOT a crank. He may or may not be on to something; it’s hard to tell.
To put his thesis in very banal terms: Wolfram is suggesting that at the very heart of science is discrete mathematics. That’s right, the universe is basically a big gigantic binary calculator that, fractal like, reproduces itself in surprising ways. The devil is in the details, of course, and while Wolfram has a wide-ranging background and a lot of good solid science to stand on, his reductivism is perhaps a tad presumptuous.
That’s not to say he isn’t wrong. He may or may not “turn science on its ear”, but he isn’t exactly the first person to have an idea like the one he’s presenting. He has modeled a fairly deterministic universe that would be very well behaved in the same way computers are very well behave. Sounds almost Deist in a weird philosophical way. It certainly is acceptably materialist in its approach to science.
Wolfram’s persentation doesn’t say that what has been done for so long has been fruitless, but rather he is offering that all of scientific knowledge can be reintrepreted in another coherent manner. To wit, Wolfram is positing that there are fundamental discrete mathematics that belie our basic idea that there may yet be something called “free will”. It also neatly explains why mathematics underlies science so well, why phenomena seem so reproduceable, and why we in the modern world have had such success in explaining the outcomes of causally connected systems. In this way, his thesis is almost too good to be true. In effect, Wolfram has decided to tackle all the big questions now and let the details work themselves out in the wash. It’s debatable whether this technique is licit in the service of unifying science. Don’t you have to know what you’re actually unifying before you go about unifying it? The answer is, of course, it depends on what venue you have the discussion. Philosophers, if they can wade through it, may find Wolfram’s book to be much more pleasing than how scientists may find it.
Wolfram isn’t the first to do create a masterwork and declare it as such. In fact, many scientists are fond of positing their “grand schema” in soundbite ways to anyone who will listen. Wolfram’s soundbite just happens to be 1000+ pages and he himself happens to be extremely intelligent.
In the end, I think we have to admit that there is something strange and wonderful about Wolfram’s work… but it doesn’t hold the be-all-and-end-all of science. One reviewer lamented that Wolfram basically had suggested that learning calculus was a waste of time. I attended a lecture by a fractal modeler who was adamant that such conclusions were nonsense. The world can be modeled in many different ways and I don’t think Wolfram has definitively proven that it works in the way he thinks it does. It may actually be impossible to ever come to a point when such a statement can be made. We are probably wise to leave such questions, for the time being, to philosophers.
What is clear is that Wolfram has patiently put out the hints that the world behaves in logic gates and binary operations, but he doesn’t have all the answers to say the least.
Still, keep an eye on this stuff; it’s not complete quackery.