Lee Smolin: the laws of the universe are changing
Quote:We tend to think of the laws of nature as fixed. They came into existence along with the universe, and have been the same ever since. But once you start asking why the laws of the universe are what they are, their invariance also comes into question. Lee Smolin is the type of theoretical physicist who likes asking such “why” questions. His inquiries have led him to believe that the laws of the universe have evolved from earlier forms, along the lines of natural selection. In this in depth interview he offers an account of how he came to this view of the evolving universe and explains why physics needs to change its view of time.
Quote:The question I immediately raise is whether this picture of an evolving set of universes, in which the laws of nature are not fixed, but are ever changing, requires us to postulate a kind of meta-law, a law that would dictate the way that this evolution can take place. So are we not back to where we started, the cosmos being dictated by some fixed meta-laws? Smolin is not happy with this solution, “you can’t solve this by just accepting that there are fixed laws, they’re just meta-laws” he says. But he also doesn’t really have a definitive answer either. It’s a question he takes seriously, however, and has spent much of his book with Roberto Mangabeira Unger tackling this issue.
Quote:Smolin has two other hypotheses for how the universe might be changing. One he calls The Autodidactic Universe, the self-learning universe, the other The Principle of Precedence - borrowing a concept from jurisprudence when thinking about laws seems quite clever, and in line with Smolin’s “trick” of stealing ideas from other disciplines. They each come with their own conceptual challenges – how can the universe “learn” anything, and how does the universe remember what has happened in the past, and use it as a precedent to decide what will happen in the future? Thinking of the universe in these terms seems to bend our concepts to breaking point, although admittedly things like machine learning, a technology that is very much real, does the same. If machines can “learn” from a trial-and-error process, why not the universe as a whole? In fact, Smolin has collaborated with Microsoft computer scientist Jaron Lanier, to model how the universe might be understood as a giant machine learning process.
'Historically, we may regard materialism as a system of dogma set up to combat orthodox dogma...Accordingly we find that, as ancient orthodoxies disintegrate, materialism more and more gives way to scepticism.'
- Bertrand Russell
- Bertrand Russell