I read On the Future: Prospects for Humanity on the train back from the Festival of Economics. (See the #EconomicsFest hashtag – recordings will go online soon.) This short and compelling book by Martin Rees, the Astronomer Royal (and a Cambridge colleague), was a bit of a dampener on my good cheer. Our prospects are not great. It turns out that the risk of a large asteroid causing mass extinction is one of the lesser worries about our future. Other existential risks have a higher probability with the same mass death/end of civilisation impact.

Take biotech terrorism: “Whatever can be done will be done by someone, somewhere,” the book calmly states in passing. Even more exotically, another: “Scary possibility is that the quarks [produced by high energy physics experiments] would reassemble themselves into compressed objects called strangelets. That in itself would be harmless. However, under some hypotheses, a strangelet could, by contagion, convert anythign else it encountered into a new form of matter, transforming the entire Earth into a hyperdense sphere about a hundred meters across.” I gather this is a remote prospect indeed, but it takes some of the gloss off the Large Hadron Collider. Strangelets, eh.

The early scientists (natural philosophers, as they called themselves) were considered ‘merchants of light’ yet science and technology have come to seem pretty scary. This book is a perfect antidote to worrying about Brexit or Donald Trump or neo-fascism, as it offers so many much bigger problems to worry about.

It tries to strike a positive note by saying science and tech offer potential solutions too. Martin Rees thus ends by calling for scientists to engage more with philosophy. I think they should be engaging more with social scientists. The barriers to taking action to safeguard humanity from any devastating effects of climate change or AI are not mainly about science and technology, but rather about what people believe and how they behave.

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