Andrew McAfee, co-author with Eric Brynjolfsson of The Second Machine Age, believes that Weak AI will destabilize employment for decades, but he doesn’t think species-threatening Artificial Intelligence is just around the bend. From his most recent Financial Times blog post:

“AI does appear to be taking off: after decades of achingly slow progress, computers have in the past few years demonstrated superhuman ability, from recognising street signs in pictures and diagnosing cancer to discerning human emotions and playing video games. So how far off is the demon?

In all probability, a long, long way away; so long, in fact, that the current alarmism is at best needless and at worst counterproductive. To see why this is, an analogy to biology is helpful.

It was clear for a long time that important characteristics of living things (everything from the colour of pea plant flowers to the speed of racehorses) was passed down from parents to their offspring, and that selective breeding could shape these characteristics. Biologists hypothesised that units labelled ‘genes’ were the agents of this inheritance, but no one knew what genes looked like or how they operated. This mystery was solved in 1953 when James Watson and Francis Crick published their paper describing the double helix structure of the DNA molecule. This discovery shifted biology, giving scientists almost infinitely greater clarity about which questions to ask and which lines of inquiry to pursue.

The field of AI is at least one ‘Watson and Crick moment’ away from being able to create a full artificial mind (in other words, an entity that does everything our brain does). As the neuroscientist Gary Marcus explains: ‘We know that there must be some lawful relation between assemblies of neurons and the elements of thought, but we are currently at a loss to describe those laws.’ We also do not have any clear idea how a human child is able to know so much about the world — that is a cat, that is a chair — after being exposed to so few examples. We do not know exactly what common sense is, and it is fiendishly hard to reduce to a set of rules or logical statements. The list goes on and on, to the point that it feels like we are many Watson and Crick moments away from anything we need to worry about.”