Why Conscience Is an Evolutionary Advantage

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In the centuries since Galileo proved heliocentrism, science has gradually come to understand more and more of our universe's natural phenomena: gravity, quantum mechanics, even ripples in space-time. But the final frontier of science isn't out there, says cosmologist and MIT professor Max Tegmark, it's the world inside our heads: consciousness. It's a highly divisive issue—some scientists think it's unimportant or a question for philosophers, while others like Tegmark think that the human experience and the meaning and purpose of life would disappear if the lights of our consciousness were to go out. Ultimately, Tegmark thinks we can understand consciousness scientifically by finding the pattern of matter from which consciousness springs. What is the difference between your brain and the food you feed it? It's all quarks, says Tegmark, the difference is the pattern they're arranged into. So how can we develop a theory of consciousness? Can we build a consciousness detector? And can we really understand what we are without unlocking humanity's greatest mystery? Tegmark muses on all of this above.

Max's latest book is Life 3.0: Being Human in the Age of Artificial Intelligence

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MAX TEGMARK

Max Tegmark left his native Sweden in 1990 after receiving his B.Sc. in Physics from the Royal Institute of Technology (he’d earned a B.A. in Economics the previous year at the Stockholm School of Economics). His first academic venture beyond Scandinavia brought him to California, where he studied physics at the University of California, Berkeley, earning his M.A. in 1992, and Ph.D. in 1994.

After four years of west coast living, Tegmark returned to Europe and accepted an appointment as a research associate with the Max-Planck-Institut für Physik in Munich. In 1996 he headed back to the U.S. as a Hubble Fellow and member of the Institute for Advanced Study, Princeton. Tegmark remained in New Jersey for a few years until an opportunity arrived to experience the urban northeast with an Assistant Professorship at the University of Pennsylvania, where he received tenure in 2003.

He extended the east coast experiment and moved north of Philly to the shores of the Charles River (Cambridge-side), arriving at MIT in September 2004. He is married to Meia-Chita Tegmark and has two sons, Philip and Alexander.

Tegmark is an author on more than two hundred technical papers, and has featured in dozens of science documentaries. He has received numerous awards for his research, including a Packard Fellowship (2001-06), Cottrell Scholar Award (2002-07), and an NSF Career grant (2002-07), and is a Fellow of the American Physical Society. His work with the SDSS collaboration on galaxy clustering shared the first prize in Science magazine’s "Breakthrough of the Year: 2003."

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TRANSCRIPT:

Max Tegmark: Of all the words I know there’s no word that makes many of my colleagues more emotional and prone to foam at the mouth than the one I’m just about to say: consciousness. A lot of scientists dismiss this as complete BS and as totally irrelevant and a lot of others think this is the central thing—you have to worry about machines getting conscious and so on. What do I think? I think consciousness is both irrelevant and incredibly important. Let me explain why.

First of all, if you are chased by a heat-seeking missile it’s completely irrelevant to you whether this heat-seeking missile is conscious, whether it’s having a subjective experience, whether it feels like anything to be that heat-seeking missile, because all you care about is what the heat-seeking missile does, not how it feels. That shows that it’s a complete red herring to think that you’re safe from future AI if it’s not conscious. It’s its behavior you want to make sure is aligned with your goals.

On the other hand there is a way in which consciousness is incredibly important, I feel, and there’s also a way in which it’s absolutely fascinating. If we rewind 400 years or so, Galileo, he could’ve told you that if you throw an apple and a hazelnut they’re going to move exactly in this shape of a parabola and he can give you all the math for it, but he would have no clue why the apple was red and the hazelnut was brown or why the apple was soft and the hazelnut was hard. That seemed to him beyond science, and science back 400 years ago could only really say sensible things about...

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